Hydraulics Backpack Water Reservoir with Bite Valve - BPA-Free, Leakproof Hydration Bladder with QuickConnect and Slide-Seal - Compatible with Most Hiking and Biking Packs

The Osprey Hydraulics Backpack Water Reservoir has completely changed the way I stay hydrated on hikes, bike rides, and long travel days. Osprey's attention to detail and build quality shines through in every part of this hydration system, making it one of the smartest purchases I’ve made for my outdoor gear setup. Built for Real-World Use The design is intuitive and trail-ready. The wide Slide-Seal top makes it super easy to fill and clean—no more awkward spills or wrestling with narrow openings. It seals tight with no leaks, even when tossed into a pack with other gear. The rigid backplate keeps the shape flat and low-profile inside my backpack, which prevents bulging and makes packing simple. Durable and Leak-Free I've put this reservoir through the wringer—hot days, rough terrain, overstuffed bags—and it still performs flawlessly. The high-quality TPU material is tough, flexible, and doesn’t leave any strange aftertaste in the water. The quick-disconnect hose is a small detail that makes a big difference when refilling or cleaning. Smart, User-Friendly Design The bite valve delivers a strong, steady flow and seals well with a simple twist. The magnetic sternum clip is a brilliant touch—it keeps the hose accessible without it flopping around. Cleaning is hassle-free thanks to the wide mouth and detachable parts. Perfect Pairing with Osprey Packs If you already use an Osprey backpack (like the Daylite, Talon, or Atmos series), this reservoir integrates seamlessly into the hydration sleeve. But even in non-Osprey packs, it performs just as well thanks to its slim profile and robust build.

Good Osprey quality. Nice water flow from reservoir to bite valve. Does not leak, product performed perfectly on a 4 day backcountry hiking trip I just took.

Great product that worked perfectly for my recent hiking adventure. Easy to use, clean, and good quality

I don’t write reviews unless things are exceptionally amazing or terrible. I loved everything about this bladder. The hose, the magnet, the back support/rigidity, universality with osprey bags, etc. I have 3 Osprey bags and love their products. This bladder ruined a recent Yosemite backpacking trip. I took my 600 dollar smart scope with me and it was completely ruined by a leak in this bladder. It was the very first time I used it. I had filled it with no issues at home. I had no issues the first night. Then while sitting in the back of the car, the bladder slowly leaked all its contents onto my equipment and shorting the circuits. I inspected to find this defect in the bladder. I wish I never bought this thing. Not only is it expensive for what it is, it now also cost me a 600 dollar telescope. Do not buy.

The twist valve broke in my hand, w/o any form of damage 3 months into owning it so now I'm unable to prevent leakage. Edit: they're sending me a replacement

I purchased an Osprey 26 hiking backpack so only found it appropriate to also buy an Osprey water reservoir. It was super easy to install and use. The added plastic piece for the support of the reservoir was extremely convenient when sliding the reservoir into the backpack when full of water. The flow of the actual mouth piece was plenty and I did not have to bite down hard at all. The quality is top notch and I didn’t experience any issues with it leaking. The only thing I will say is that I wish it were easier to dry these out so they don’t get moldy. I found that if I take open tongs and insert the ends into the bag and place the bags tilted upside down they did dry out pretty well. Yes I know there are probably better ways to doing this but I’m a first time hiker and learning. 🤣🥺 I decided to throw out the mouth piece after a week worth of hiking as they do sell that separately. Buy this reservoir you won’t regret it! & someone please tell me how to actually dry these things out. 😭

This is a well built hydration reservoir with nice features for the user. We got 3L reservoirs for my husband and I and 1.5L reservoirs for my two young kids. We have taken them on several hikes so far and they are easy to fill and easy to clean due to the wide opening that spans the whole end of the reservoir. I have had no issues with leaks and the wide opening makes it easy to dry the reservoir if you can force the mouth to stay open. I recommend buying a hydration bladder drying frame, which are inexpensive and make this much easier. The reservoir seems durable so far and survived getting kicked around a muddy kayak without damage. The hose and bite valve are nicely designed and, so long as you remember to flip the shut- off valve, protect from leaks. The hoses are a bit more difficult to clean and dry, however. I bought a specific cleaning kit with a brush for the hose. One con of this reservoir is that, even after several uses, there is a plastic taste to the water. This doesn’t bother me too much but does bother my daughter quite a bit. The 3L fits well in my Gregory Maya 20L pack and in my husband’s Gregory 28L pack. One note, however is that the Osprey reservoirs do not fit on the Gregory packs’ integrated reservoir hanger. This is easily fixed with a rubber band however and was worth it to me for the ease of use of the Osprey reservoir. It does hang on my kids’ REI packs’ integrated hanger. The reservoir itself is super light weight so it doesn’t add much to the weight of the water itself. Lastly, I really like the handle on the reservoir, which makes it easier to hold steady when filling. Overall, a great hydration reservoir and we’re happily hiking with you purchase.

I used a camelbak for years and always struggled with leaks. It could be user error but I never had success closing the camelbak without spilling and there was always leaking when I would take the bag out to refill. This reservoir is super user friendly. I use it for long distance cycling and had no issues or leaks after 6 hours of riding. Things to note: -- When you first open it, the seal to open the bag is VERY strong. Be super careful opening it the first time as I bet it would easily rip. Once you open it that first time, there's no issue from then on. -- I modified mine to use the camelbak bite valve instead because I find this type to be very mold prone. It was a bit of a tight fit, but I was able to get the camelbak one on and never had any issues after that.

Très facile d utilisation pour mon sac à dos hikelite26. L insérer, le remplir, le nettoyer. Et semble très solide.

Perfect size for day hikes

Muy útil

Excellent water reservoir, read reviews saying about leaks. I’ve waited to post this review to give a good honest account of it. Been out on around 5 long treks using it. Flat walks. Hill walks and mountains. Absolutely faultless and bone dry bag at the end of the day. I’ve had the smaller version in the past. Lost it when moving and bought this one. It’s a bit expensive but if you’re going to use it it’s definitely worth it. Some people have said about it going “mouldy” just from water being used. I’ve not had this problem and had it for around 4 months now. Spotless. Easy to open and fill up. Opens up nice and wide to fill or empty. Definitely recommend.

I highly recommend this hydraulics pack. It fits fine in an Osprey Tallon 22 liter. In the beginning the water tasted a bit like plastic. So I have filled it up with water a couple of nights (also two times with lemon juice) and now it is fine. Taking zips during a hike instead of taking backpack off to grap a bottle is nice.