Gregory 3D Hydro Hydration Reservoir - 3 Liters

Color: Ocean/Orange
Size: 3 L
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Designed for easy on-trail sipping, the Gregory 3D Hydro 3-liter hydration reservoir dries quickly, attaches easily to compatible packs and feels comfortable thanks to an anatomic fit.

Location Image of color Ocean/OrangeLocation Image of color Ocean/OrangeLocation Image of color Ocean/Orange
Location Image of color Ocean/Orange


  • Soft-molded 3D reservoir design prevents contact between top and bottom layers when hanging open, dramatically speeding drying time and discouraging bacteria growth
  • 3D form and full-length baffle distribute weight by positioning water flat against your back for optimal stability and comfort without adding weight or cylindrical bulk
  • Integrated hanger makes it convenient to store or easy to hang dry—on or off the trail
  • A soft-molded handle on the spine makes filling easy; the co-molded baseplate provides full-length support for hassle-free insertion and removal from the pack
  • Inline quick-disconnect fitting makes for easy refills without having to unthread the hose from the shoulder harness
  • Lever action on/off bite valve with magnetic clip allows for confident, leak-free storage while traveling to and from the trail (magnet accessory included)
  • EasyGrip rubberized fill port opening with integrated hose locator and screw-cap tether
  • Compatible with 3D Hydro enabled Gregory packs featuring the SpeedClip hydration mounting system
  • SpeedClip mounting system offers one-handed, lock-and-go linkage between the reservoir hanger and pack hydration sleeve


View all Gregory Reservoirs

Technical Specs

Best Use


Liquid Capacity (L)

3 liters

Liquid Capacity (fl. oz.)

101.4 fluid ounces

Bite Valve Shut-off Switch


Wide-Mouth Opening


Quick Disconnect Tubing



Metallocene PE film (BPA- and PVC-free)


17.25 x 7 x 3 inches

BPA Free



7 ounces

55 reviews with an average rating of 4.4 out of 5 stars

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