Gregory 3D Hydro 3L Reservoir - 3 Liters

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The Gregory 3D Hydro 3L reservoir performs like a soft bladder, but fills, clean and dries like a water bottle. Get the best of both worlds with its soft-molded, self-supporting design.

  • Features

    • Innovative 3D design prevents contact between the top and bottom layers, dramatically improving drying time and discouraging bacterial growth without affecting packability
    • Integrated QuickDry hanger hook allows easy storage and convenient hang drying after cleaning
    • Full-length baffle helps prevent barreling and sloshing as you hike
    • Positive-click SpeedClip hook inside the hydration sleeve of compatible Gregory packs (sold separately) eliminates hassle when installing or removing the reservoir
    • Magnetic, leak-free DryLock bite valve offers quick, one-handed opening and closing with the simple press of a button
    • Rubberized EasyGrip fill port opening and crescent handle allow easy handling and filling in any environment
    • Reservoir is made of high-strength, taste-free, BPA- and PVC-free Metallocene polyethylene film
    • Works with nearly all hydration-ready packs


    View all Gregory Reservoirs
  • Technical Specs

    Best Use


    Liquid Capacity (L)

    3 liters

    Liquid Capacity (fl. oz.)

    101 fluid ounces

    Bite Valve Shut-off Switch


    Wide-Mouth Opening



    Mettallocene polyethylene film


    17 x 7 x 3 inches

    BPA Free



    6.6 ounces

  • Reviews
    73 reviews with an average rating of 4.3 out of 5 stars

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