Providing maximum levels of stability and ease of use, the Hydraulics™ reservoir is essential for keeping hydrated on your outdoor adventures. The unique combination of the pour shield and Slide-Seal™ top-opening allows you to easily fill and empty the reservoir, whilst enabling complete access for cleaning after use. Our unique Osprey Hydraulics™ anatomically shaped back plate provides stability and creates a flat profile to ensure the reservoir easily slides in and out of your pack. The bite valve is magnetic enabling easy stow and access to water on the go. When not in use the bite valve also incorporates an easy on/off twist lock system. Built from strong yet light TPU material, which is designed to withstand either freezing or hot water. The QuickConnect™ system allows you to remove the reservoir for easier loading, replacement and cleaning.
Features
Anatomically shaped Hydraulics™ Reservoir
Removable and replaceable hose and bite valve
Litre markings printed on reservoir body
Slide-seal™ top opening for easy filling and cleaning
Pour shield extends the collar for easy filling
Carry handle allows easy reservoir management and filling
Bite Valve offers fast, smooth water delivery
Made from a tough durable TPU material
Weight: 0.2 kg Dimensions: 39L / 18W / 8D cm Fabric: TPU Film
The approximate size of the packed product or the sales package is 250 x 530 x 40 mm.
Weight 0,338 kg(Includes the weight of the packaging)
Capacity 3 liters
Warranty 12 month(s)
Country of origin China
Comments
Anonymousverified buyer, 11.6.2026
Overall rating
☆☆☆☆☆
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It works. I’m deducting a small amount for the delivery time, as shipping took about 10 days.
Anonymousverified buyer, 10.6.2026
Overall rating
☆☆☆☆☆
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I haven't regretted it, and it has seen a lot of use. It is easy to dry and fits Osprey backpacks perfectly.
Martti S.verified buyer, 7.6.2026
Overall rating
☆☆☆☆☆
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An excellent hydration bladder. It hasn't leaked at all so far, and it's easy to fill. It does exactly what it promises. I haven't needed the magnetic clip yet, but the optional mouthpiece dust cover is a recommended purchase.
Ville K.verified buyer, 3.5.2026
Overall rating
☆☆☆☆☆
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Easy to use and allows a good amount of water to travel in the backpack without taking up much space.
Matias S.verified buyer, 24.4.2026
Overall rating
☆☆☆☆☆
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Convenient shut-off feature and filling opening. Carrying handle. Long hose and magnetic clip included
santeri t.verified buyer, 15.2.2026
Overall rating
☆☆☆☆☆
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Absolutely amazing product, the best I think you can find in this size.
Olavi L.verified buyer, 29.11.2025
Overall rating
☆☆☆☆☆
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Fits nicely in both my Talon20 daypack and Rinka's Aether 65. High-quality product.
Anonymousverified buyer, 20.8.2025
Overall rating
☆☆☆☆☆
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A good, large-capacity hydration bladder that fits, among other things, the Osprey Aether 100 backpack, as well as the daypack integrated into the hood of the backpack.
The hydration bladder also comes with handy spare and additional parts.
Pasi S.verified buyer, 16.8.2025
Overall rating
☆☆☆☆☆
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A good addition to the Rook backpack.
Anonymousverified buyer, 14.7.2025
Overall rating
☆☆☆☆☆
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A really good and functional backpack for long summer hikes. I can't imagine a hydration backpack could have been designed better.