Bottom Line

The Cherainti Hydration Bladder stands out as the most affordable option in our lineup of hydration systems. It is even less expensive than the ultra-minimalist Platypus Platy, but the Cherainti bladder comes complete with a hydration hose and bite valve. 

It’s not quite as feature-rich as some of the pricier bladders; there’s no sternum strap magnet or handle for convenient filling. The reservoir lacks both interior and exterior structure. However, the hose does include a quick release, and it’s actually the only bladder we tested that comes with a bite valve cover included. 

If affordability is your priority but you still want a hydration system that works, the Cherainti is a great option. If you’re looking for something lightweight or searching for the best user experience, it might be worth investing in a different bladder.

And for more info, check out some of our other popular gear guides:

How We Tested

We hiked with the Cherainti bladder on the High Point Trail and the Nature Trail near Blackrock Campground in Joshua Tree. We also took it out on several days of bouldering in Joshua Tree National Park. We primarily tested it during the winter in the Southern California desert, where temperatures ranged from 40 to 70 degrees.

Weight & Packability

While the Amazon product page states that the Cherainti Bladder weighs only 3.2 ounces in the 2-liter size, our measurements indicate it weighs over 7 ounces. This isn’t the heaviest bladder in our lineup, but it certainly isn’t considered ultralight. The inclusion of some hard plastic components, such as a large plastic twist cap, contributes to the increased weight. 

With the hard twist cap, the Cherainti Bladder doesn’t fold or roll up as easily as the highly packable Hydrapak Contour or the VectoX. We measured its minimum packed size at 7 by 5.5 by 3.25 inches. In terms of weight and packability, the Cherainti falls somewhere in the middle of the pack.

Ease of Use

While the Cherainti Bladder serves its purpose, it lacks many additional features for enhanced comfort or an improved experience. We appreciate the quick-release mechanism on the hose, allowing for easy refills without detaching the entire system from the backpack. The plastic twist cap includes a hole, enabling it to be suspended in various backpacks. 

The Cherainti Bladder is the only one we tested that features a bite valve cover. As we took our pack on and off during hikes in the sandy desert, this proved to be useful. However, we found the bulky cover somewhat more challenging to thread through some of the hydration hose openings in our backpacks.  

In addition to these features, the Cherainti Bladder is fairly minimalist; it lacks a rigid backer or internal baffles, causing water to slosh around somewhat while running. You can stop the water flow by pressing the bite valve in, but we found this to be less secure than the on-off lever present in other models. 

The bite valve also has a lower water flow than those on other bladders. During a gravity test, it only filled about 0.4 cups while the bite valve was pinched, compared to 1.25 cups filled by the Camelbak Crux. Anecdotally, the bite valve required more aggressive sucking to get the same amount of water compared to other bladders we tested. 

Ease of Cleaning

Since the Cherainti Bladder has a plastic twist cap, it can’t be turned inside out, which makes cleaning and drying a bit more challenging. Our tester was able to fit her hand inside the twist cap’s opening, allowing her to scrub the inside fairly well. 

The bladders with twist caps dried more slowly during our tests than those with sliders, and this one was no exception. It took over seven hours for the Cherainti Bladder to fully dry. Pouring it out completely after cleaning is difficult, and water tends to pool at the bottom. Additionally, it retained a plastic-like taste even after being washed thoroughly.

Taste

As soon as I opened it, the Cherainti Bladder had a rubbery taste that lingered even after a thorough wash. Compared to some other bladders, this one was among the worst tasting. However, some of the pricier options tasted even worse; the Osprey Hydraulics and Gregory 3D Hydro had a distinct iodine flavor.

Durability

Over six weeks of hiking in the desert, we didn’t notice any leaks from the Cherainti Bladder. We stuffed it into backpacks brimming with climbing gear, tossed it carelessly in our car, and tested it over many miles of trail. So far, the bladder has held up without any issues.

Should You Buy the Cherainti Hydration Bladder?

For budget-conscious hikers seeking a functional hydration system, the Cherainti Bladder works quite well. It is less than half the price of other similar products while still including a hose and bite valve. There are some drawbacks to its design; it is slightly bulkier than our favorite lightweight products and lacks the specialized features of more expensive options. Throughout our field testing, however, we remained happy and hydrated with the Cherainti Bladder.

What Other Hydration Bladders Should You Consider?

If you’re willing to spend a bit more for a slightly better product, check out some of our other favorite value options. 

CamelBak Crux Review: The Crux keeps its price relatively low while providing a superior user experience compared to the Cherainti, making it our choice for best value. It tastes significantly better and has a higher flow rate than the Cherainti, resulting in an overall enhanced drinking experience. Its bite valve shutoff switch is slightly more secure, and it features an ergonomic handle that simplifies filling. The Crux shares a similar design with the Cherainti Bladder, but the experience feels more elevated. 

Platypus Hoser Review: If you don’t mind limited features, the Hoser is another simple, more affordable option. It is also a good choice for those seeking lighter, more packable hydration bladders. Similar to the Crux, it offers better taste and a higher flow rate than the Cherainti. While it’s a bit more stripped down than both products, it features a small twist cap opening and very few additional components beyond a hose and bite valve.

Bottom Line

When comparing minimalist hydration systems, the HydraPak Seeker offers the durability that the Platypus Platy lacks, but that is the only aspect we prefer. We have put the Seeker through the ringer over several seasons of hiking and climbing; so far, we haven’t encountered any leaks or tears in the material. 

During initial use, we found it challenging to drink from the Seeker. We quickly spilled water all over ourselves attempting to drink from the floppy bag through the wide opening. We’ve gotten used to it over time, but we still need to use two hands to hold it while drinking and tip it slowly. It has also retained a rubbery taste, even after being thoroughly washed. 

Although it’s a bit pricier than similar products, it has a longer lifespan, making it a better value. For weight-conscious hikers, backpackers, and alpine climbers who also value durability, the Hydrapak Seeker is an excellent choice. If you’re seeking a complete hydration system with a hose, check out the rest of our hydration bladder lineup.

And for more info, check out some of our other popular gear guides:

How We Tested

We have used the HydraPak Seeker throughout several seasons of climbing, hiking, and backpacking. We’ve taken it on alpine climbs in the Sierra and Cascades, multi-pitch rock climbs in Red Rock Canyon, and hikes in Joshua Tree. We have been able to test it more thoroughly than other products, and its standout feature is its durability.

Weight & Packability

The Hydrapak Seeker falls into the ultralight category of hydration systems, weighing approximately 2.3 ounces in the two-liter size. We measured its minimum packed dimensions to be 7 by 2.5 by 2 inches. While the Platy is still somewhat lighter, the Seeker is a strong contender among lightweight options. 

We found the Seeker to be a good, lightweight option for long days in the mountains when we aimed to shed ounces. Its soft, flexible material makes it comfortable against the back while hiking or climbing, and it fits easily into any bag. 

Ease of Use

One thing we noticed right away is that drinking from the Seeker is more challenging than from similar products. Its soft, flexible material combined with the wide mouth opening makes spills hard to avoid. We’ve spilled all over ourselves more times than we can count. While we’ve gotten used to it, we still have to hold the bag with two hands and carefully pour water into our mouths. 

One other thing we noticed during testing is that the dark color of the Seeker causes the water inside to warm up more quickly when exposed to the sun. This wouldn’t be an issue if the Seeker were kept in a backpack all day, but if it’s lying out in the sun, your water will quickly become less refreshing on a hot day.

Ease of Cleaning

The Seeker dries more slowly than other hydration bladders. It’s tricky to fully empty after cleaning, and water tends to pool just inside the opening, even when hung upside down. Scrubbing the inside is also difficult since you can’t fit a hand through the opening; a long brush would be helpful.

Taste

We don’t love the rubbery taste that the Seeker retains, even after being cleaned thoroughly. Over time, we have also noticed that the fabric handle connecting the twist cap and the bladder has begun to develop a moldy smell. This might be a care issue; if you wash the Seeker regularly and dry it thoroughly each time, it will likely be less prone to developing a bad smell.

Durability

Compared to similar ultralight options, the durability of the Hydrapak Seeker truly shines. While the Platy eventually tears at the seams after heavy use, the Seeker has not let us down so far. We have used both products similarly, taking them on multiple overnight alpine climbs, numerous multi-pitch rock climbs, and countless hiking days. At an affordable price, the Seeker offers great value, as it lasts season after season.

Should You Buy the HydraPak Seeker Water Bag?

Despite its drawbacks, we think the HydraPak Seeker fills an important niche. While the Platypus Platy is our favorite in the ultralight category, the Seeker surpasses the Platy in durability. Although the Platy has consistently failed over time, we’ve never needed to replace the Seeker, even after years of tough use. For minimalist backpackers and alpine climbers, the HydraPak Seeker is a lightweight option that endures the test of time.

What Other Hydration Bladders Should You Consider?

Here are some other minimalist options that we liked from our line-up of the best hydration bladders.

CNOC Outdoors Vecto 2L Review: The Vecto is fairly lightweight, though it’s about an ounce heavier than the Seeker. A significant advantage of the Vecto compared to the Seeker is how easy it is to clean and dry. With a wide opening on one end that closes with a slider, you can scrub out the entire interior of the Vecto. It also dries faster than any other bladder we tested; the Vecto was completely dry in about 25 minutes after washing.

The hard plastic slider makes it slightly less packable than the Seeker, and we have concerns about that piece failing. For the minimalist hiker, the Seeker remains a better choice, but for the germ-conscious, the Vecto offers a bit more peace of mind. 

Platypus Platy Review: The Platy is our favorite ultralight, minimalist bladder. It’s slightly lighter than the Seeker and packs down even smaller. We have found it easier to drink from, as the plastic is a bit stiffer. If it’s not completely full, we can even drink from the Platy with one hand, like a hard-sided water bottle. It also tastes better than the Seeker; we found it to be virtually taste-free right out of the package.

The main drawback of the Platy is its durability. Its stiff seams tend to tear over time. This usually happens after significant use, though, and it’s easy to notice when the seams start to split before they actually fail. If you’re seeking more durability, the Seeker outperforms the Platy.

Bottom Line

Among those that we tested, the Platypus Hoser is the lightest of all of the hydration bladders that come with hoses. This low weight is achieved mainly through minimalist design, which will be worth it for some hikers but not for others. 

The Hoser lacks usability features that are common in other models we tested. There is no shutoff switch on the bite valve, no handle for easy filling, no sternum strap magnet, and no structural support on either the interior or exterior. Hikers looking for specific features should consider other bladders, while those who appreciate minimalist design will like the Hoser. 

Platypus also claims the Hoser to be “taste-free,” and we actually agree. This simple bladder offers better taste right out of the package than most of the more featured and expensive options. The Hoser is a worthwhile purchase for hikers seeking the lightest possible hydration system and willing to sacrifice features to achieve that. If you’re an ultralight backpacker or trail runner, consider exploring some of the other options on our list.

And for more info, check out some of our other popular gear guides:

How We Tested

We hiked with the Hoser on the Nature Trail and Warren Peak Trail in the Black Rock area of Joshua Tree National Park. We also took it on shorter walks around our neighborhood. Most testing occurred during the winter in the Southern California desert, with daytime temperatures ranging from 40 to 70 degrees.

Weight & Packability

The Platypus Hoser’s minimalist design makes it the lightest and most packable of all the bladders we tested that include a hose system. Weighing just 3.6 ounces, it’s nearly as light as the VectoX, which doesn’t have a hose or bite valve. It also rolls up and packs down to a compact size of 9 by 3.5 by 1.5 inches, including the hose. 

It achieves its light weight through a simplified design. The twist cap opening measures less than an inch wide, whereas those on the Camelbak Crux or Cherainti Bladder can be up to 4 inches in diameter. Its features are limited to the water bag, hose, and bite valve.

Ease of Use

To achieve its light weight, the Hoser sacrifices many features. The one that impacted our testing the most was its lack of a shutoff switch on the bite valve to prevent leaks. While driving to a trailhead, we packed the hose and bite valve inside our backpack, ensuring that the uncovered mouthpiece wouldn’t touch the dirty floor of our car. Sure enough, the bite valve leaked onto a down jacket in our backpack, soaking the insulation. This shouldn’t pose a major issue while hiking, as long as nothing presses on the valve.

The hoser also omits features like a handle for easy filling, interior baffles, or a rigid backer to maintain its structure in a backpack. However, it does include a small loop cut into the reservoir, allowing it to be suspended in a backpack. During our testing, these other features seemed less important than the bite valve shutoff switch.

Ease of Cleaning

The Hoser proved to be the hardest to clean of all the models we tested. It can’t be turned inside out, and the opening isn’t quite big enough to fit a hand inside for scrubbing. Fortunately, Platypus does sell a special reservoir cleaning kit, which includes a long brush for scrubbing hard-to-reach areas. 

With its small, twist-cap opening, the Hoser dried slowly. It took over seven hours to become moisture-free when hung up outside in the desert. It cannot be turned inside out like some bladders that dry more quickly.

Taste

Besides its lightweight, our favorite aspect of the Platypus Hoser is its fresh taste. Platypus claims the Hoser to be “taste-free,” and we believe they achieve this better than most of the other bladders we tested.

The Hoser tasted fresh right out of the package, in contrast to the Gregory 3D Hydro and the Osprey Hydraulics, which both have a distinct iodine flavor even after cleaning.

Durability

Although we experienced some leaking from the bite valve, we didn’t observe any splitting along the seams or leaking from the twist cap threads. Over six weeks of testing, the Hoser has demonstrated durability so far.

Should You Buy the Platypus Hoser?

The Hoser’s lightweight design and affordable price will attract minimalist hikers and backpackers who aren’t particular about features. We also believe it tastes better than some of the pricier, feature-rich models like the Gregory 3D Hydro and the Osprey Hydraulics. While it is slightly more prone to leaking due to the absence of an on-off switch on the bite valve, most leaks can be avoided with proper care.

What Other Hydration Bladders Should You Consider?

If the Platypus Hoser doesn’t quite fit your needs, check out the rest of our favorite hydration bladders from this season.

Hydrapak Contour Review: The Contour keeps its weight low while incorporating several additional features. For one, its bite valve includes a shutoff switch that minimizes leaking. It is also significantly easier to clean and dry, thanks to its sliding closure and ability to turn inside out. Runners may appreciate the interior baffles, which help prevent water from sloshing around. The Contour achieves all these features while adding only two ounces to the Hoser’s weight.

Platypus Platy Review: If you appreciate the minimalist design of the Hoser, you might also enjoy the even simpler Platypus Platy. Designed without a hose, the Platy is our lightest option at just 1.2 ounces. We particularly favor this choice for multi-pitch rock climbing or overnight alpine climbs, where lightweight gear is crucial. Its main drawback is the absence of a hose, but some may prefer that setup. It also offers the same fresh taste as the Hoser.

Bottom Line

Think of any feature you want in a hydration bladder, and the Osprey Hydraulics Reservoir likely includes it. It is structurally reinforced with a rigid back plate, allowing you to effortlessly slide it into any backpack, even when it’s packed to capacity. It features a shutoff switch on the bite valve, a sternum-strap magnet to secure the hose, and a plastic handle for easier filling. 

All of these luxurious features come with a cost, both in weight and price. It is among the most expensive options we tested, second only to the highly specialized HydraPak HydraSleeve. The Hydraulics Reservoir is a bit bulky and heavier than most other bladders. We noticed a distinct lingering flavor of iodine when drinking from it. 

If you’re a hiker who values a seamless user experience from your hydration bladder, the Osprey Hydraulics will bring you joy. A couple of features, such as the rigid back support and the placement of the quick disconnect, make the Hydraulics an ideal choice for multi-day backpacking. If you’re an ultralight backpacker or trail runner, consider exploring some of the lighter options on our list.

And for more info, check out some of our other popular gear guides:

How We Tested

During our testing period this winter, we scrambled over the granite boulders of Rattlesnake Canyon in Joshua Tree National Park and hiked the trails in our neighborhood on Mojave Desert Land Trust land. The Osprey Hydraulics kept us hydrated throughout, under mostly sunny skies in the Southern California desert.

Weight & Packability

If other bladders sacrifice features to achieve lighter weights, the Osprey Hydraulics adds extra ounces to provide a feature-rich design and a premium user experience. The Hydraulics weighs 7.6 ounces, making it our second heaviest bladder after the specialized HydraSleeve. 

Due to its rigid backer and ergonomic plastic handle, the Hydraulics does not roll up or pack down easily. We measured its minimum size at 15” by 6” by 1.5,” making it one of the bulkier bladders we tested. If you appreciate the design features but want to reduce weight, Osprey produces a lighter version of this bladder called the Hydraulics LT, which lacks a rigid backer.

Ease of Use

The user experience is where the Osprey Hydraulics really shines; it feels like Osprey has thought of everything. Filling it in the sink is a breeze thanks to the ergonomic plastic handle. The plastic back plate helps the bladder maintain its shape as you slide it back into the hydration pouch, even if your backpack is full of gear. Its quick disconnect also releases the hose near the top of the bladder, rather than the bottom. This means you won’t have to sift through all of your gear to reattach the hydration hose after filling. 

The sliding closure also has built-in loops if your backpack features a suspension strap that closes with Velcro or a buckle. The bite valve includes an on-off switch that is easy to operate with one hand, which we believe is one of the most important features. 

The sternum strap attachment features a strong magnet that feels quite secure and prevents the hose from flopping around while you run or hike. However, the plastic attachment itself seems slightly more prone to slipping off than the one on the Contour. During our testing in the desert, we noticed quite a bit of sand getting stuck to the magnet, but this didn’t appear to affect its strength too much.

Ease of Cleaning

The wide opening of the hydraulics measures about 3.5 inches in diameter, which is large enough to accommodate our tester’s hand. This made cleaning it reasonably easy, although she still needed a long brush, as the opening is too small for her forearm to reach deep enough to clean the entire interior. Additionally, the center baffle impeded the process and made scrubbing a bit trickier. 

This was also one of the slowest bladders to dry. Because it’s a fairly slender bladder, the inner walls tend to stick together when wet, and the sliding closure end rests in a sealed position, restricting airflow. Even while hanging in the desert sunshine, the Hydraulics bladder took over four hours to fully dry.

Taste

Once cleaned and dried, we were disappointed to find that the Hydraulics still retains an iodine taste. It’s not as bad as the taste of the Gregory 3D Hydro or the Cherainti Bladder, but it’s also not as fresh as the hydration systems from Platypus or Camelbak.

Durability

We didn’t notice any durability issues with the Hydraulics Reservoir during our testing period. We are curious to see how the rigid plastic pieces hold up over time, as they seem vulnerable to cracking or breaking upon impact.

Should You Buy the Osprey Hydraulics Reservoir?

Multi-day backpackers who expect a lot from their gear will appreciate the thoughtful design of the Osprey Hydraulics. If you’ve struggled to stuff your full water bladder back into your overnight pack, you might understand the rigid backer that helps the bladder keep its shape as you slide it into the hydration sleeve. You also won’t have to fish through your gear to reconnect the hose, as the quick-release is positioned near the top of the bladder. 

These premium features come with a higher price tag and heavier weight. For those just starting out backpacking or thru-hikers looking to shed ounces, you may find something else that better fits your needs.

What Other Hydration Bladders Should You Consider?

With so many other great bladders, you’re sure to find one that fits your needs on our list of this season’s favorites. 

Hydrapak Contour Review: The Contour manages to retain our favorite features while shedding a few ounces from the Osprey Hydraulics bladder. The Contour also has a sliding closure, but it’s easier to clean and dry because it can be turned inside out. The bite valve features a shutoff switch, and the hose has a sternum strap magnet, both of which we appreciate for their ease of use. We also think the Contour tastes slightly better than the Hydraulics bladder, a major win in our book.

Osprey Hydraulics LT 2.5 L Reservoir: Though we didn’t test it ourselves, we’d recommend checking out the Hydraulics LT if you want something lighter but like the overall design of the Hydraulics. It has the same ergonomic handle, on-off lever on the bite valve, and sternum strap magnet, but the LT 2.5 liter shaves off about 1.5 ounces from the regular 2 liter version. It appears to achieve this mainly by ditching the rigid backer, so if that’s your favorite feature, it would be best to stick with the regular Osprey Hydraulics Reservoir.

Bottom Line

The Camelbak Crux is user-friendly, affordable, and doesn’t taste like rubber; what more could you want in a hydration bladder? Among all the bladders we tested, the Crux delivers the best drinking experience. Water flows easily through the bite valve, and it tastes superior to nearly all the other bladders with hose systems. 

It’s not the most lightweight or packable option; its bulky plastic handle makes it easy to fill but difficult to fold and store when not in use. It also lacks structural features like a rigid back plate. For the most part, we didn’t miss these aspects while hiking with the Crux. 

The Camelbak Crux is an excellent choice for backpackers and hikers seeking a functional product who dislike the rubbery taste often found in hydration bladders. Additionally, it is one of the most affordable complete hydration systems, providing great value for your money. For day hikers who enjoy sipping while they walk, check out our favorite hydration bladders with hoses.

And for more info, check out some of our other popular gear guides:

How We Tested

The Camelbak Crux kept us hydrated during big hikes and short walks in the Southern California desert this winter. We hiked with it up the first 4,000 feet of the iconic Cactus to Clouds trail near Palm Springs. We also took it on shorter hikes and climbing days in Joshua Tree National Park. The weather was mostly mild, with temperatures ranging from 40 to 75 degrees.

Weight & Packability

The Crux is not the lightest or most packable bladder available. The CamelBak website states that the 2-liter size weighs 7 ounces. We measured it at approximately 7.8 ounces, which places it on the heavier end of complete hydration systems that include a hose. 

The large plastic handle makes the Crux easy to fill from a sink or a stream, but it adds significant bulk. We measured it at 9.75” by 5.5” by 2.5” in its minimum packed size. For backpackers flying to their final destination, a more svelte option like the HydraPak Contour or the Platypus Hoser might be a better choice.

Ease of Use

Our favorite features of the Camelbak Crux are its high flow rate and its great taste. The water flows easily from the bite valve with minimal effort, and it doesn’t have that rubbery flavor found in many other hydration systems. In our flow rate test, the Crux achieved the highest flow of any bladder, filling 1.25 cups in ten seconds when the bite valve was pinched. 

The bite valve includes a shutoff switch to prevent leaks, which we found to be quite secure. The large plastic handle makes filling easier, though it sacrifices some packability, as we mentioned earlier. There are limited interior baffles to prevent water from sloshing around, so runners or those engaging in high-impact activities may prefer a different model.

Ease of Cleaning

While the Crux cannot be turned inside out for cleaning and drying, the twist cap opening is large enough to accommodate most hands. Among the bladders we tested with twist caps, this one featured the largest opening, allowing us to scrub the inside of the bladder easily. 

Since it can’t be turned inside out, the Crux was one of the slower bladders to dry, like the other twist cap models. It took more than seven hours to completely dry when hung up outside in the desert. This is partly because the bladder is difficult to fully empty; water tends to pool near the twist cap.

Taste

As mentioned above, the Crux tasted better than most other hydration bladders. After thorough cleaning, it retained only a barely noticeable plastic taste. The only products that tasted better were the Platypus Hoser and Platy. Some of the more expensive bladders, including the Osprey Hydraulics and Gregory 3D Hydro, tasted considerably worse than the Crux.

Durability

Some consumer reviews we read prior to testing mentioned leaks through the threads of the twist cap. So far, we haven’t experienced that, which may be due to user error rather than product issues. After many weeks of hiking and stuffing the Crux into a fully packed backpack, we didn’t notice any leaks. 

Should You Buy the Camelbak Crux?

The Camelbak Crux is a classic choice for hikers and backpackers looking for a great hydration experience. While it doesn’t offer all the bells and whistles of the slightly more expensive Osprey Hydraulics or Gregory 3D Hydro, we didn’t really miss those features during our testing.

Most importantly, it doesn’t taste like plastic, something that few of the models we tested managed to achieve.

What Other Hydration Bladders Should You Consider?

The Camelbak Crux falls in the middle of the road when it comes to features and weight. Find lighter, more minimalist options as well as bladders with more structure on our list of this season’s best hydration bladders. 

Hydrapak Contour Review: If you’re a runner or an ultralight backpacker looking for a more packable option, the Hydrapak Contour may work for you. Without a bulky twist cap, the Contour rolls into a smaller package that fits better in airplane baggage. It’s a few ounces lighter than the Crux, and it also features interior baffles to prevent water from sloshing. For these reasons, trail runners may prefer the Contour over the Crux. 

Osprey Hydraulics Reservoir Review: Overnight backpackers looking for a seamless experience may appreciate the added features and thoughtful design of the Osprey Hydraulics Reservoir. With a rigid back plate, it’s easier to load and unload from a fully packed overnight pack. The hose quick disconnect is located on the top of the bladder, which means you won’t have to fish through your gear to reconnect the hose after a refill. The sternum strap magnet holds the hose securely in place during a hike or run. These extra features make it a bit more expensive than the Crux, but they may be worth it to some.

For convenient, hands-free hydration on the go, you’ll need a hydration bladder to put in your pack. We’ve used 46 bladders over the years from brands like CamelBak, HydraPak, Platypus, and more, ranging from the most basic options to reservoirs with all the bells and whistles. To help us identify the best, we consider features, weight, packability, taste, and more, across various price points. 

We’ve searched the market and put each bladder to the test on hikes, runs, ski tours, and snowshoe trips. If you’re looking for a new hydration system, we’ll point you in the right direction. If you need additional accessories or integrated systems, we have you covered with our lists of the best hydration backpacks and water filters. If you’re also open to a classic container, we’ve tested and reviewed our favorite water bottles for trail and everyday use.

And for more info, check out some of our other most popular gear guides:

Quick Picks for Hydration bladders

Check out this quick list of our favorite hydration bladders or continue scrolling to see our full list with in-depth reviews.

Best Hydration Bladder Overall: HydraPak Contour ($43)

Best Ultralight Hydration Bladder: Platypus Platy ($20)

Hydration Bladder with the Best Features: Gregory 3D Hydro ($50)

Best Lightweight Hydration Bladder for Filtration: CNOC Outdoors VectoX ($26)

Best Value Hydration Bladder: CamelBak Crux ($37)

Best Bladder for Overnight Backpacking: Osprey Hydraulics Reservoir ($48)

Best Hydration Bladder for Cold Weather: HydraPak HydraSleeve ($68)

Best Water Taste: Platypus Hoser ($34)

Most Durable Hydration Bladder: HydraPak Seeker Water Bag ($25)

Best Budget Hydration Bladder: Cherainti Hydration Bladder ($15)

How We Test

We analyzed weight and packability, ease of use, ease of cleaning, taste, and durability. Through comparative tests and extensive field use, we scored each bladder based on its performance in these categories.

WEIGHT & PACKABILITY

As backpackers, we typically carry all of our overnight essentials on our backs, so lightweight gear can make the experience much more enjoyable. 

We measured each bladder on a scale to cross-reference the weight listed on the manufacturer’s site. When evaluating this category, we awarded high marks for the absolute lightest weight but also gave points to products that managed to incorporate features while maintaining a low weight. 

To assess packability, we measured the minimum packed size of each product. First, we rolled each bladder into the smallest package possible and secured it with rubber bands. Next, we measured its length, width, and height to evaluate its packability.

TASTE

Some of the bladders we tested were virtually taste-free right out of the package, while others retained a strong iodine or rubbery taste even after being thoroughly washed. After scrubbing and drying each bladder, we conducted a side-by-side taste test to compare the flavors. We also checked the materials and ensured we only included products that were guaranteed to be BPA-free. 

EASE OF USE

To measure ease of use, we examined how the features of each bladder affected our user experience in the field. We also conducted a few comparative tests to evaluate the flow rate from the bite valve and the ease of filling. 

Smart features can enhance the user experience, but it’s important to know which ones you value most. The products we tested range from minimalist water bags to hydration bladders equipped with various additional features. Some features to consider include a hose and bite valve, a shutoff switch for the bite valve, a sternum strap magnet, a sliding closure or twist cap, a quick disconnect for the hose, and a handle for easy filling.  

Some bladders include structural elements such as internal baffles or rigid back plates. Internal baffles can help prevent water from sloshing around during high-impact activities like trail running. A rigid back plate helps maintain the bladder’s shape and makes it easier to load into a fully packed backpack. More features don’t always equate to better; they come with the costs of weight, bulk, and sometimes expense. 

To assess the flow rate from the bite valve, we conducted a gravity test. Holding each bladder in the air, we pinched the valve and measured the amount of water that flowed into a cup in ten seconds. The results generally indicate how easily water flows through the hose when sucking on the bite valve. We also wanted to assess how easy it would be to fill each bladder in the field without a sink. Since our testing primarily took place during the winter in the desert, we simulated a shallow body of water using a bathtub. By filling the tub up to six inches, we evaluated how close to maximum capacity we could fill each bladder without using a hard-sided water bottle.

EASE OF CLEANING

The design of each hydration bladder significantly affects how easy it is to clean and dry. Generally, bladders that close with a plastic slider are easier to scrub thoroughly than those with a twist cap. The wide opening allows you to fit a hand or sponge inside. 

To evaluate this category, we tested which bladders were easy to clean with a kitchen sponge, which were dishwasher safe, and which required special cleaning kits for thorough washing. After scrubbing them as best we could, we hung the bladders outside in the sun and timed how quickly they dried.

DURABILITY

While true durability requires multiple seasons of testing, we could evaluate any leaks or durability issues during our test period. Each bladder was taken on a minimum of three hikes, runs, snowshoe trips, or ski tours, with notes on any spills or leaks in our packs. We also used each bladder for a day of rock climbing, stuffing them into a backpack filled with metal climbing gear. Testing products in the desert exposes us to spiky plants, rough rock, and varying conditions.

Why Trust DuskHiker

Gear Analyst Katie Griffith has been a professional outdoor educator and guide for fourteen years. She has led dozens of multi-week backpacking and canoeing trips in Minnesota and the Rocky Mountains. Additionally, she has guided glaciated peaks in the Cascades and currently works year-round as a rock and alpine climbing guide. She is an AMGA Assistant Rock Guide, Apprentice Alpine Guide, and Certified Single Pitch Instructor, as well as a Wilderness First Responder and a Leave No Trace Trainer. 

The more time she spends recreating and working outdoors, the more Katie appreciates well-made products. Spending over 175 days in the field each year, Katie puts all of her gear through the ringer. She knows firsthand that reliable products not only make outdoor experiences more enjoyable, but they can also help manage risk when things go south. Gear that stands the test of time contributes to the sustainability of the outdoor recreation industry as well. She cares about protecting the natural places she loves, so sustainably sourced materials and durable products are her top priorities. 

Analysis & Results

VALUE

When we consider value, we’re looking for the hydration bladder that provides the best experience at the lowest price. The Camelbak Crux features a variety of useful elements, is easy to clean, and does not have a plastic taste. It achieves all of this at a relatively low cost, making it our choice for best value. The Cherainti Bladder is a solid budget option for those looking for the cheapest price, but we believe the Crux justifies the additional investment. 

The Hoser is another noteworthy option in the budget category, particularly for recreationalists looking to reduce both weight and costs. It’s priced similarly to the Crux but nearly halves the weight. The Hoser achieves this lightweight design by simplifying its features, resulting in trade-offs for the user experience.

WEIGHT & PACKABILITY 

There are clear winners for the absolute lightest weight and smallest packed size; minimalist products like the Platy or HydraPak Seeker are the top choices for anyone looking to cut down on weight as much as possible. Both of these hydration bags feature minimalist designs, comprising little more than a twist cap and a reservoir. 

It’s also worth acknowledging designs that efficiently incorporate features while keeping weight down. The HydraPakContour manages to stay under six ounces while offering a wide array of features, which is why it won the prize for best overall. The stripped-down Platypus Hoser includes a reservoir, hose, and bite valve, while achieving a weight that’s just under four ounces. Neither the Hoser nor the Contour contains many bulky plastic parts, so both are also quite packable.

TASTE

Among the worst-tasting hydration bladders were also the most expensive. The Gregory 3D Hydro and the Osprey Hydraulics Reservoir both retained a distinct iodine flavor, even after thorough cleaning. 

The Cherainti Bladder had a rubbery taste, and all of the HydraPak reservoirs held onto a slight plastic flavor. After cleaning, the Camelbak Crux and VectoX had very little flavor, while the Platy and the Hoser actually lived up to Platypus’s “taste-free” claim, even right out of the package.

EASE OF USE

The two most feature-rich bladders on our list are the Osprey Hydraulics Reservoir and the Gregory 3D Hydro. Both come with a rigid handle for filling the bladder, a sternum strap magnet to prevent the hose from flopping around, and a bite valve shutoff switch. The Gregory 3D Hydro also features a hook for hanging the bladder while it dries. The Osprey Hydraulics Reservoir is the only bladder with a rigid back plate, making it easier to load into a fully packed overnight backpack. 

During our field testing, the most crucial feature turned out to be a bite valve shutoff switch. The Platypus Hoser was the only bladder without one, leading to leaks all over a down jacket in our backpack. While the other features were nice, they didn’t significantly influence our experience. We observed that the sternum strap magnets attracted a lot of sand during our testing in the desert, which reduced their effectiveness. 

During our flow test, we found that the Platypus Hoser and the CamelBak Crux had the highest flow rates, filling 1.5 cups and 1.25 cups in ten seconds, respectively. These two bladders also provided the best overall drinking experience, as they both tasted better than the other bladders. Conversely, the Cherainti Bladder had the lowest flow rate at 0.4 cups in ten seconds.

The results of our fill test show that the bladders with the smallest openings were the most difficult to fill. The Platypus Hoser was the trickiest overall; we barely managed to fill it to half a liter. We could only get about a liter into the Platy and the Seeker. We recommend bringing a hard-sided water bottle to assist with filling these on an overnight trip. We successfully filled most of the other bladders to capacity by dunking them underwater.

EASE OF CLEANING

The hydration bladders with sliding closures are generally the easiest to clean and dry. Thanks to the wide opening, most of these bladders can be turned inside out, making it simple to thoroughly scrub the interior. This also aids in quick drying, reducing the chance of mold buildup. The VectoX stands out in this category; after being turned inside out and hung up, it was completely dry within twenty minutes. The HydraPak HydraSleeve and Contour were also quite fast to dry, taking 30 minutes and an hour, respectively. 

The Osprey Hydraulics is an exception; even though it has a sliding closure, its rigid back plate makes it impossible to turn inside out. Our main tester was able to fit her hand inside the bladder to clean it out, but she has smaller-than-average hands. The bladders with twist caps were a mixed bag. Some, like the CamelBak Crux and the Cherainti Bladders, have larger openings and are easy to clean.

The Gregory 3D Hydro has a small opening, making it harder to scrub the inside without special tools. These also dried slowly, with most taking over seven hours to be completely moisture-free.

The hardest bladders to clean and dry were those with the smallest twist-cap openings, like the Platypus Platy and the Hoser. Fortunately, Platypus offers a special cleaning kit with a long brush to scrub hard-to-reach areas. The Platy is also one of the few bladders we tested that is dishwasher safe.

DURABILITY

During our testing period, none of the bladders had any structural failures that we observed. We took each product on multiple hikes, runs, snowshoe excursions, and ski tours. We also packed many of the bladders into a fully stuffed backpack filled with climbing gear. The only leak we noticed was from the Platypus Hoser, which is the only hydration bladder that lacks a shutoff switch on the bite valve. When we packed it into a climbing pack, it leaked all over a down jacket.

From past experience with the Platy, our main tester knows that this product has a limited lifespan. She has owned several Platys before, and they eventually tend to fail at the seams and start leaking. She has also used the HydraPak Seeker extensively and has yet to replace it. 

How to Choose a Hydration Bladder

There are advantages and disadvantages to each hydration bladder, and many of them serve specific purposes.

HOW MUCH WATER SHOULD I CARRY?

The liquid capacity of a hydration bladder is typically measured in liters (L), with most holding between 1L and 3L. Water is heavy (1L weighs about 2 lbs.), so it’s important to carefully consider how much you’ll actually drink and plan accordingly.

Having a larger maximum capacity can be beneficial for long days on the trail, but you don’t need to fill your reservoir to the brim if you want to keep your load light. To estimate how much water you’ll need to carry, a good rule of thumb is to aim for 0.5L per hour for moderate activity in mild temperatures. You may need to adjust this depending on conditions and personal preferences. Strenuous hiking in high heat may require 1L of water or more per hour.

When determining your maximum capacity, it’s also important to consider the environment where you’ll be recreating. For a desert backpacking trip, you may need to carry multiple days’ worth of water at a time, so a large capacity (4+ liters) water storage bag will be essential. If you’re hiking on trails that lack a water source all day, you’ll want at least 2-3L of capacity for a full day of hiking.

DO I WANT TO HYDRATE ON THE GO?

While most of the hydration bladders we tested include a hydration hose and bite valve, some of our minimalist options do not. Many backpackers and hikers prioritize the ability to hydrate on the go. With a convenient hose system, you won’t have to stop and pull out a water bottle every time you want to quench your thirst. 

For some ultralight backpackers or alpine climbers, forgoing a hose is worthwhile for the weight savings. Those who recreate in winter or cold-weather environments may also opt against a hose system because they tend to freeze in frigid temperatures. Our tester is an avid multi-pitch rock climber, and she prefers a hose-less bladder to minimize additional gear dangling while climbing.

HOW DO I LIKE TO RECREATE?

The hydration system you choose may also depend on your preferred outdoor recreation activity. Overnight backpackers may value additional features that make their bladders easier to fill and carry in a fully packed backpack. With its rigid backplate and easily accessible quick disconnect, the Osprey Hydraulics Reservoir fulfills that niche well. 

Trail runners may be more willing to sacrifice features for a lightweight bladder. The Hydrapak Contour sheds ounces while still offering some helpful features, making it a great choice for trail runners or ultralight backpackers. The interior baffles help prevent water from sloshing around during high-impact activities, and the magnetic sternum strap keeps the hose in place. 

Alpine climbers may prefer a simpler system while high on a cliff face; dangling hoses can actually be a nuisance. Therefore, climbers might choose an ultralight, flexible water bottle like the Platypus Platy or HydraPak Seeker. Additionally, hoses tend to freeze in cold temperatures at high elevations, making these water bags a better alternative for mountaineering, snowshoeing, ski touring, or other cold weather activities. 

FILTERING WATER USING A HYDRATION BLADDER

If you plan to refill your hydration bladder from natural sources on the trail, you’ll need to carry a filtration method to ensure the water is safe to drink. Chlorine Dioxide Drops / Pills are lightweight and affordable, although they require a waiting period.

You can choose from reservoir filter kits, or you can create your own inline system by ordering an extra quick connect kit, bite valve, and a Sawyer Squeeze. Another option is to use a filter like the Katadyn BeFree to scoop and filter water into your hydration bladder.

As mentioned above, certain bladders are more compatible with specific filters. Check out our Best Water Filters list for a comprehensive overview of our favorite water filtering methods for hiking.

HYDRATION BLADDER CARE

Most hydration bladders have polyethylene linings, which retain tastes and odors more readily than polycarbonate bottles. For this reason, we recommend only filling them with water. The best method to maintain any plastic water bottle or bladder is to rinse it after each use and allow it to air dry completely.

Periodically add a fizzy cleaning tablet, such as those from Bottle Bright, or mix in a tablespoon each of bleach and baking soda, then let it sit overnight. This, combined with a thorough scrubbing using a bottle brush, will keep grime, unpleasant flavors, and odors at bay.

Conclusion

With a variety of features, weights, and prices, choosing the right hydration bladder for your outdoor adventures can be tricky. That’s why we’ve scoured the market and thoroughly tested each bladder on the list. After extensive field use and comparative analysis, we’re confident we’ve presented the best hydration bladders for this season. 

Bottom Line

The CNOC Outdoors VectoX excels during overnight backpacking trips as a system for collecting, filtering, and storing water at camp. Its wide opening allows for easy filling from a stream without a hard-sided water bottle, and it is compatible with a variety of filters. Furthermore, it dries faster than any other hydration bladder we tested. 

The VectoX is less convenient as a hydration system for a day hike or a single-day outing, as its specialized features don’t make as much sense. While it’s relatively easy to drink from the VectoX, its lack of a hose makes it less ideal if you prefer to hydrate on the go. 

As a lightweight and packable bladder offered at an affordable price, the VectoX would add value to any backcountry trip, especially when you expect to camp far from water sources. For day hikers who enjoy sipping while they walk, check out our favorite hydration bladders with hoses.

And for more info, check out some of our other popular gear guides:

How We Tested

We tested the VectoX on several day hikes and climbing days in Joshua Tree over the winter.

Weight & Packability

We tested the VectoX, which is CNOC Outdoors’ slightly more durable version of the original Vecto Bladder. It still falls into our ultralight category, although it has some specialized features that make it a bit heavier than similar bladders. 

At 3.32 ounces, it’s the third lightest bladder we tested, only behind the Hydrapak Seeker and the Platypus Platy. The regular Vecto reduces the weight a bit more, coming in at just 2.8 ounces for the two-liter size. 

The VectoX rolls up and stores easily when empty. We measured its packed size to be 6.5 by 2.25 by 1.5 inches, making it second only to the Platyplus Platy in the packability category. If you’re traveling by plane and are worried about baggage limits for your next adventure, the VectoX is a fantastic, stashable option. 

The plastic slider makes the VectoX somewhat bulkier than our other favorite ultralight bladders, but it significantly increases the ease of cleaning, which we’ll discuss further below.

Ease of Use

The VectoX has a different specialty than our other hydration systems, so its ease of use depends on your goals. Without a hydration hose, this is not the best option if you prefer to drink water while walking. 

If you’re searching for a versatile water storage bag for backcountry camping, the VectoX will fulfill your requirements. Its wide opening allows for easy filling from a stream or lake, while the smaller opening accommodates several different filtration systems.

The VectoX was designed as a water collection, filtration, and storage system. It comes with two different thread sizes to pair with a variety of water filters. The 28mm thread works well with Sawyer filters, Lifestraw Flex, or HydroBlu Versa Flow. Additionally, it features a 42mm thread to accommodate larger filters such as the Katadyn Befree. Be sure to check your filter size before ordering the VectoX! 

The loop on the plastic slider makes it easy to hang from a tree and use as a gravity filtration system. Since the VectoX doesn’t have a hose, we usually just packed it in our backpack on top of our other gear while hiking. There’s no need for the VectoX to hang in a pack like other hydration bladders.

Ease of Cleaning

When it comes to ease of cleaning and drying, the VectoX is the clear winner. The wide opening on one side allows for easy scrubbing of the interior of the bladder without any special tools. Although it is not dishwasher safe, its easy-to-clean design makes this a minor concern. 

The VectoX dries faster than any other hydration bladder we tested, particularly because it can be turned inside out. After washing and hanging it up to dry, it was moisture-free in just twenty minutes. In contrast, most other bladders took hours to dry completely.

Taste

While the VectoX initially had a slight taste, it mostly faded away. We thoroughly washed each bladder and conducted a comparative taste test. After washing, the VectoX was largely taste-free, especially when compared to some of the other bladders.

Durability

During our testing period, we used the more durable VectoX. It’s only a few ounces heavier than the regular Vecto, but it’s constructed with heavier, more durable TPU material. While CNOC claims that the Vecto has a breaking point of 220 pounds, the VectoX withstands up to 450 pounds, which is a significant improvement. 

So far we haven’t noticed any leaks. The material is more pliable than the stiffer plastic of the Platypus Platy, making it less likely to tear along the seams.

Should You Buy the CNOC Outdoors VectoX?

For overnight trips in the backcountry, the VectoX simplifies water collection, filtration, and storage. Canoe campers and backpackers will appreciate how easy it is to fill the bladder from a lake or stream, even without a hard-sided water bottle. The VectoX is especially useful for campers anticipating sleeping further from a water source and needing a storage bladder. 

Hikers who want to stay hydrated on the go may find themselves missing a hose system. Although drinking directly from the VectoX is relatively easy, it’s not intended to function as an active hydration system.

What Other Hydration Bladders Should You Consider?

If the VectoX doesn’t quite fit your niche, check out our other favorite hydration bladders.

Platypus Platy Review: Our favorite ultralight bladder is the Platypus Platy. It’s super light and can pack down even smaller than the VectoX. If you’re looking for a minimalist option to stay hydrated, it doesn’t get simpler than the Platy. The VectoX is easier to fill from a wider variety of water sources because of its wide opening. We often like to pair a small, hard-sided water bottle with the Platy to help us fill it. We also want at least a small water bottle for hot drinks anyway, so it ends up being a multi-purpose piece of gear.

Hydrapak Contour Review: If you prefer the sliding closure on the VectoX but desire a complete hydration system with a hose, the Hydrapak Contour is a solid choice. Weighing 5.6 ounces, the Contour remains quite light and packable compared to other hydration systems we tested. The wide opening with the slider facilitates quick drying and simplifies filling compared to other bladders as well.

Bottom Line

The Gregory 3D Hydro is filled with features that make it easy and enjoyable to use in the great outdoors. It’s an excellent choice for hikers who want to stay hydrated on the go, thanks to its well-designed hose and bite valve. 

Backpackers and hikers alike will appreciate the bite valve with a shutoff feature to prevent leaks, as well as the sternum strap magnet that keeps the hose from flopping around. The hose quick disconnect is positioned near the top of the bladder, making it easier to reload into the backpack after refilling. 

The Hydro may not be the lightest or most packable bladder available, so alpine climbers or ultralight backpackers might want to explore some of our other favorites in the gear guide. However, overnight backpackers seeking a seamless experience will appreciate the added features of the Gregory 3D Hydro.

And for more info, check out some of our other popular gear guides:

How We Tested

We tested the Gregory 3D Hydro on numerous hikes in Joshua Tree National Park during December and January. We used it while hiking the Warren Peak Trail and the Panorama Loop Trail near Black Rock Campground, took it on neighborhood walks in the Mojave Desert Land Trust, and even brought it along on climbing days in the national park.

Weight & Packability

Due to its features and structure, the Gregory 3D Hydro is one of the bulkier options in our lineup. At 6.5 ounces, it’s not the heaviest choice, but it certainly doesn’t fall into the “ultralight” category. 

The hard plastic handle and medium-sized twist cap make it difficult to roll up. Once we packed it down as small as possible, we measured its dimensions to be 6.5” by 7” by 1.5.” The hose’s quick disconnect is located at the top of the bladder, which also makes it harder to roll up. However, this placement does have benefits, which we’ll discuss below.

Ease of Use

The thoughtful design of the Gregory 3D Hydro makes it one of the easiest bladders to use in the field. The hard plastic handle simplifies the filling process, whether you’re using a faucet or dunking the bladder in a lake. The 3D shape allows the Hydro to load into a backpack more easily than some of the floppier bladders. 

Though the bite valve eventually worked fine, it was sealed shut when we received it. We almost resorted to using a knife, but after reading comments online, we realized this was a common issue. Instead, we massaged the bite valve between our fingers for about five minutes, and it finally opened up. 

Once the Hydro is in place in your pack, the secure sternum strap magnet helps prevent the hose from flopping around, which is especially beneficial for runners. During our testing in the desert, we noticed that the magnet tends to attract sand. This made the magnet less effective, but the sand was relatively easy to brush off. 

We also appreciate how the hose’s quick disconnect is situated near the top of the bladder. This way, if you need to refill the Hydro during a hike, you won’t have to dig to the bottom of your backpack to reconnect the hose. Finally, the bite valve’s shutoff switch prevented any leaks during testing.

Ease of Cleaning

The small twist cap opening makes cleaning the 3D Hydro somewhat tricky. Our tester couldn’t fit her hand inside the bladder to scrub it out. A longer scrub brush with a handle would be needed to thoroughly clean the inside. Cleaning tablets would be helpful in fully cleansing the Hydro. 

In theory, the 3D shape of the Hydro is meant to help it dry more quickly. In practice, it dried about as slowly as any of the other bladders that cannot be turned inside out, taking over seven hours to become moisture-free.

We are curious to see if the 3D shape prevents it from molding in the long term, compared to the bladders without any internal structure. We appreciate the integrated hook that allows it to hang up for drying without needing a clothespin.

Taste

Unfortunately, the Gregory 3D Hydro retains a distinct iodine taste, even after cleaning. Initially, the taste was unpleasant and difficult to eliminate. After several uses, it improved somewhat, but a lingering plastic taste persisted throughout the testing. 

Durability

Throughout our testing, we did not notice any leaks from the 3D Hydro, as long as we ensured the bite valve was closed. There was no tearing along any seams or failures.

Should You Buy the Gregory 3D Hydro?

For backpackers and hikers looking for a seamless experience, the Gregory 3D Hydro is an excellent hydration system. It’s easy to load into an overnight backpack and straightforward to refill. Water doesn’t leak or slosh around, and the hose remains secure during use.

While the 3D Hydro isn’t the lightest option for those aiming to reduce weight, it boasts some of the best features among the products we tested. 

What Other Hydration Bladders Should You Consider?

If the Gregory 3D Hydro doesn’t fully meet your needs, consider exploring some of the other options in our lineup of this season’s top hydration bladders.

Osprey Hydraulics Reservoir Review: If you like the user-friendly design of the Gregory 3D Hydro, you might also appreciate the Osprey Hydraulics Reservoir. It features similar qualities to the Hydro, but it also includes a rigid back plate. This design helps maintain the shape of the reservoir as you load it into a fully packed backpack. This structural feature makes the Osprey Hydraulics our top choice for overnight backpackers who will frequently refill their bladders on the trail. 

HydraPak Contour Review: The HydraPak Contour is a lighter-weight option that retains essential features. For trail runners or ultralight backpackers seeking to shed ounces without compromising the user experience, the Contour is an excellent choice. Unlike the minimalist Platypus Hoser, the Contour includes helpful features like a bite valve shutoff switch and a hose quick disconnect. It also has interior baffles that prevent water from sloshing around and a secure sternum strap magnet. Somehow, the Contour manages to accomplish everything, making it our top overall pick.

More Photos

Bottom Line

The Hydrapak Contour combines smart features with a lightweight, packable design, making it our top choice among this season’s best hydration bladders. 

The Contour features a bite valve with a shutoff switch, a quick-disconnect hose, a magnet to prevent the hose from flopping around, a wide opening with a slider closure, interior baffles, and a handle for easier filling. Despite all these features, it still weighs just under six ounces. 

For backpackers, hikers, and trail runners looking to reduce weight while enjoying plenty of features, the Hydrapak Contour is an excellent choice. Although it’s not the cheapest bladder in our lineup, its price remains competitive and provides a better user experience, making it a fantastic value. 

Discover more great options in our best hydration bladder gear guide.

And for more info, check out some of our other popular gear guides:

How We Tested

We took the Contour on day hikes in Joshua Tree during the winter, and we even brought it along while snowshoeing in Minnesota during a cold snap. Its hose did freeze at 15-degree weather, but we would expect that with any non-insulated hydration bladder. 

Weight & Packability

Among our complete hydration systems with hoses, the HydraPak Contour was one of the lightest. Weighing under six ounces, it was lighter than all other comparable products except the Platypus Hoser. It offered many more features than the Hoser, which will be worthwhile for many despite the slightly heavier weight. 

We measured its minimum packed size at 8.5 by 3 by 2.25 inches, which is quite compact for a bladder with a hose. The Contour achieves its impressive packability by incorporating fewer bulky plastic components than other bladders.

While the CamelBak Crux features a rigid plastic handle for filling the bladder, HydraPak includes a flexible handle on the Contour, reducing bulkiness. After detaching the hose, the Contour easily rolls up and stores conveniently during travel.

Ease of Use

The HydraPak Contour’s feature-rich design makes it easy and enjoyable to use on the trail. It includes a loop integrated into the plastic slider that can be used to hang it in backpacks with a buckle or Velcro attachment point.

The bite valve features a shutoff switch to prevent leaks, and we observed that the valve offers a particularly high flow compared to other bladders we tested. We also appreciate the interior baffles; while trail running, these help minimize water sloshing around too much. 

It also features a magnet that can attach to a backpack’s sternum strap, preventing the hose from flopping around while hiking or running. The attachment mechanism seems a bit less secure than the one on the Osprey Hydraulics bladder; it hasn’t fallen off yet, but we are concerned about losing it.

Overall, we noticed that the magnets attract a lot of sand, especially when hiking in the desert.One of our testers took the Contour on a snowshoe day hike in fifteen-degree weather in Minnesota. Within an hour of hiking, the hose completely froze, making it difficult for him to get water. We’d expect this from most non-insulated bladders. For a system with a fully insulated hose and bladder, check out the HydraPak Hydrasleeve. 

Ease of Cleaning

The slider closure enables the Contour to be flipped inside out for a thorough scrubbing of the interior. This feature also facilitates quick drying, although the interior baffles can cause it to retain moisture longer than simpler models. 

After being flipped inside out, cleaned, and hung to dry, the Contour was fully dry within an hour and twenty minutes. In comparison, some of the bladders with twist caps took hours to dry.

Taste

The HydraPak Contour had a mild rubbery taste, though it was not as pronounced as some of the other bladders. All of the reservoirs made by HydraPak – the HydraSleeve, Seeker, and Contour – ranked in the middle when it comes to taste. They are not taste-free, but they don’t have the iodine flavor like some of the other bladders.

Durability

During our testing, we did not notice any leaks or failures in the HydraPak Contour. The bladder is somewhat challenging to turn inside out, and we anticipate this could be a potential failure point in the future.

Should You Buy the HydraPak Contour?

For hikers and runners seeking a lightweight hydration bladder that doesn’t compromise on features, the HydraPak Contour is an excellent option. We were impressed by how light the Contour is while still providing features like a sternum strap magnet, an on-off switch on the bite valve, and a handle.

The lightweight design, along with the interior baffles that prevent water from sloshing around, makes this choice particularly appealing for trail runners. 

What Other Hydration Bladders Should You Consider?

If the HydraPak Contour isn’t quite what you’re looking for, you’re sure to find a hydration bladder that fits your needs among the rest of our favorites.

HydraPak Hydrasleeve Review: If you enjoy the features of the Hydrapak Contour but plan to be outdoors in the winter, consider the Hydrapak HydraSleeve. The HydraSleeve is an insulated sleeve that accommodates a 3-liter HydraPak Elite reservoir. The hose is insulated to prevent water from freezing or warming up. Weighing 10.8 ounces, the HydraSleeve is considerably heavier than the Contour, but this extra weight may be necessary to stop the hose from freezing in cold weather. 

Osprey Hydraulics Review: The Osprey Hydraulics is slightly heavier and bulkier than the Contour, but it offers even more useful features at a similar price. The Hydraulics has a rigid back on one side, so it retains its shape better when you slide it into a backpack. This can make it easier to reload into a fully packed overnight bag. It also features a hard plastic ergonomic handle that simplifies filling it with water.

More Photos

Bottom Line

The Platypus Platy is an ultralight, flexible water bottle perfect for the weight-conscious thru-hiker or alpine climber. It’s easy to roll up and stash when not in use, and its two-liter capacity will keep you hydrated for miles. Compared to the other bladders we tested, the Platy was also relatively taste-free, even right out of the box.  

An obvious drawback is the Platy’s lack of a hose and bite valve, which makes it impossible to sip on the go. Some hikers and climbers may prefer this system, especially when weight and packability are top priorities. Another downside is the Platy’s limited lifespan. Our main tester has owned several of these flexible bottles in the past, and they have all eventually split at the seams after hard use. 

With its affordable price, the Platy isn’t tough to replace – though it does create more plastic waste. It’s the go-to hydration system for our main tester, who has used the Platy on backcountry alpine adventures, long hikes, and multi-pitch climbs. 

How We Tested

Our main testing period was during the winter in Joshua Tree. We took the Platy on plenty of hikes and climbing days, shoving it into our pack stuffed with lots of climbing gear. Our primary tester has also used the Platy extensively in the past, bringing it on overnight backcountry trips, multi-pitch climbs, and day hikes.

Durability

Our main concern with the Platy is its durability. We’ve owned several Platys over the last few years. Though we love them, they’ve all eventually failed at the seams. This doesn’t happen right away, however – only after we’ve first put them through the ringer, stuffing them in loaded packs and using them day after day. 

Thankfully, the Platypus Platy bottle has never actually failed us in the field; the leaks have come on slowly, so it’s easy to notice when the seams are close to splitting. They’re pretty cheap to replace when they fail – though we don’t like the plastic waste this produces.

Taste

Similar to the Platypus Hoser, the Platy was virtually taste-free right out of the package. It is one of the only bladders that did not have even a slight plastic or rubbery taste after cleaning it. Even after repeated use, this flexible water bottle does not pick up any bad taste.

Ease of Use

Compared to the other hydration bags we tested, like the Seeker or VectoX, it was fairly easy to drink out of the Platy. The plastic is somewhat stiff, so it held its shape while we were drinking out of it. Although, we did use two hands when it was full. The small opening also makes it easier to prevent spills while hydrating. 

For those looking for a hose system that allows hydration on the go, the Platy is not the best choice. Although it’s easy to fill from a faucet at home, the Platy is a little trickier to fill from a lake or stream. Using a hard-sided water bottle helps. We’ve also had luck filling it from places where water is running over rocks, creating mini waterfalls in small streams.

Weight & Packability

Weighing in at just 1.3 ounces, the Platy easily wins the prize for weight and packability. Without water, we measured its minimum packed size to be 7.5 by 2.25 by 0.5 inches. It’s easy to roll up and stash, so it’s a great option for airplane travel as well.

Our main tester is an avid climber and guide as well as a backpacker, and the Platy is her go-to hydration system for a variety of activities. She loves it for multi-pitch climbing, due to its light weight and flexibility. It’s more comfortable in a pack than a hard-sided water bottle. She has also used it on multi-day trips in the backcountry, especially when light weight gear is a priority. 

One of the ways that the Platy sheds ounces is its lack of a hose system. This would be a downside for many hikers and backpackers who like to hydrate on the go. Our main tester likes to pair the Platy with a 16 ounce Nalgene bottle that she keeps accessible for sipping while hiking. That way, she has a hard-sided bottle to use for hot drinks alongside her lightweight hydration system.

Ease of Cleaning

The Platypus Platy is one of the only bladders we tested that claims to be dishwasher safe. This is a smart design because the Platy’s small opening would otherwise make it quite difficult to clean. Platypus does sell an additional reservoir cleaning kit that includes a long brush for hard to reach areas. During our drying test, we found that the Platy fell in the middle of the pack; it dried quicker than some but not as quick as the bladders with wide openings.

Should You Buy the Platypus Platy Bottle?

For alpine climbers or thru-hikers looking for minimal features and an ultralight design, the Platypus Platy water bottle is a great option. But it’s not the best choice for hikers and backpackers who like to drink while they walk since it lacks a hose system. Paired with a 16 ounce hard-sided Nalgene bottle, the Platy is our main tester’s go-to hydration system for big days in the mountains. We have some concerns about its durability, but the Platy is still a decent value at a highly affordable price.

What Other Hydration Systems Should You Consider?

Check out a few of the other hydration bag systems in our line-up of hydration bladders. 

HydraPak Seeker Water Bag Review: The HydraPak Seeker is another flexible water bag that is quite lightweight and packable. It also lacks a hose, so it’s more ideal for folks who prioritize lightweight gear. 

CNOC Outdoors VectoX Review: The VectoX is similar to the Platy, but it has a wide opening that closes with a slider. This allows it to dry much more quickly, and it’s a bit easier to fill from a lake or stream.