The 3D Hydro 3L Reservoir is a hydration bladder designed specifically for Gregory packs. Its 3D self-supporting shape prevents collapse and speeds drying. The full-length internal baffle reduces liquid sloshing during movement. It features a Drylock magnetic bite valve that remains accessible and drip-free. The Speedclip attachment secures the reservoir in place. Its anatomical design sits flat against the back for comfort. The crescent-shaped handle aids filling, and the QuickDry hanger simplifies drying and storage.