The Amphipod Hydraform Soft-Tech Reservoir 1.5L helps keep your hands free during your run. The Soft-Tech Reservoir weighs only 4.5 oz but packs an impressive 1.5 liters of water. A wide mouth makes it easy to fill and clean, while a high-flow bite valve gives you quick sips and leak-free performance. Amphipod designed the bladder to work with most hydration vests and packs, so you can fill up and be on your way in a flash.