OspreyHydraulics Backpack Water Reservoir with Bite Valve

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 UseThe 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-FreeI'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 DesignThe 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 PacksIf 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.

This working great and holds water like it should . Took this in an all day hiking trip in the Grand Canyon and lasted me all day with two extra water bottle of but I have no complaints.

This was my first time buying or using a backpack-style water bag, and I went back and forth between several brands since I wasn’t familiar with any of them. Glad I landed on this one. It’s clearly designed by people who actually use these things. The layout is smart, it fit perfectly in a generic pack I picked up, and I especially love the bite plug—works perfectly and doesn’t leak. For a first-timer, this was a great pick. Super easy to fill with the squeeze wide mouth opening.

The media could not be loaded. Horrible. The other 1 star reviews are accurate. On first fill, I noticed two leaks in my pack. Similar reviews and problems can be found on other reputable retailers for this item (REI, etc). Very sad this company has fallen to such lows. Not buying Osprey again.

I purchased this same bladder years ago (2018 ish?) and only just finally blew through it (my own fault, not a manufacturer issue). I didn’t even question purchasing the exact same brand. I love the new look and feel to it, my only 2 complaints are: it’s just slightly longer than the old one, but it’s not an issue and that the inner bladder has a “divider” which I can see making it harder to clean. I may purchase the osprey cleaning kit that has the thing that keeps it open to dry properly. Other than those, I like that the top really seals itself now even before you close it. I love the new flow options on the mouthpiece that allow you to select gradually open, all the way, or totally closed. It seems more sturdy than the old version and I’m confident it will hold up for years, just like the last one.

Top quality and easy to use and clean

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.

Great replacement water pack. Fills and seals nice and easy. Water flow is fine, love the locking/magnetic valve. Fits my osprey pack. Feels a bit expensive, but you can’t argue with the quality and design.