You are using a web browser we don't support. Please use the latest version of one of these browsers.

Mozilla Firefox

Google Chrome

Apple Safari

Microsoft IE

Back to top

Osprey Hydraulics Reservoir - 3 Liter

This product is no longer available.


  • Taste-free metallocene polyethylene material is strong and durable; material is BPA and PVC free
  • Antimicrobial formula helps prevent the growth of bacteria and mold inside the reservoir
  • Backer plate shapes the reservoir to keep it low-profile so it won't interfere with the comfort of your backpack
  • Includes a magnetic sternum strap that you attach to your backpack, giving the magnetic bite valve a place to rest when it's not in use
  • Wide-mouth opening makes it easy to fill and clean the reservoir; cap quickly opens and closes with a 3/4 turn
  • Osprey Hydraulics reservoir has a 180° pivoting on/off valve that rotates for quick flow control


View all Osprey Reservoirs

REI membership


Best Use Cycling
Bite Valve Shut-Off Switch Yes
Wide-Mouth Opening Yes
Material(s) Metallocene polyethylene
Dimensions 16 x 7 x 3 inches
BPA Free Yes
Weight 10.9 ounces
Liquid Capacity (fl. oz.) 101 fluid ounces
Liquid Capacity (L) 3 liter

The REI Difference

100% satisfaction guaranteed

We stand behind everything we sell. If you are not satisfied with your REI purchase, you can return it for a replacement or refund within one year of purchase.

REI's guarantee doesn't cover ordinary wear and tear or damage caused by improper use or accidents.

If your item has a manufacturing defect in its materials or workmanship, you can return it at any time. See our limited warranty.

Gear & advice you can trust

At REI, we live and breathe the outdoors, and we're passionate about sharing our expertise with people of all skill levels. Whether you're new to the outdoors or a seasoned explorer, we'll take the time to understand your needs and help you find the right gear for you.

10% annual member refund

Anyone can shop at REI, but for a one-time $20 fee you can become an REI member and enjoy a lifetime of benefits. These include an annual member refund, typically 10% back on eligible purchases.*



*10% is typical but not guaranteed. Your refund is based on eligible purchases, which exclude REI gift cards, services, fees, REI Adventures trips, REI Garage, and discounted items. Learn more