Source Tactical Gear 3L Widepac Low Profile Hydration Reservoir Low-profile hydration reservoir leaves more room in your cargo pack; designed for ballistic vest integration; 3-liter capacity (100 ounces) Taste-free reservoir with maintenance-free Glass Like liner prevents bio-film build-up Grunge Guard Technology inhibits bacteria growth on the reservoir and drinking tube surfaces Patented non-bite Storm push-pull valve for straw-like drinking Drinking tube with Cool Weave cover blocks UV light and insulates; compatible with QMT accessories