Product Review

The Platypus Big Zip Water Reservoir for Hydration Backpacks offers an evolution in hands-free, taste-free hydration. Available in two styles: The EVO with Fast Flow Valve and the Standard Valve. The Fast Flow Valve delivers an extremely high flow rate (50% more than the Standard Valve), self-sealing HyFLO bite valve, large 5/16-inch drink tube, simple one-handed filling, easy cleaning, fast drying, quick access drink tube disconnect, and leak-proof shutoff valve, while the Standard Valve features a 1/4-inch drink tube, easy cleaning, and a low profile design. The Big Zip is a top pick for hikers, backpackers, travelers and mountain bikers for their hydration backpacks. This hydration reservoir features embedded silver-ion to protect clean water from mold and bacteria. All materials are certified food-grade, BPA-, BPS-, phthalate-free and taste-free for a clean taste. The Platypus Big Zip+ is available in 3 sizes: the 1.5-Liter measures 8.5 x 13 inches and weighs 5.6 ounces; the 2.0-Liter measures 8.7 x 15 inches and weighs 6 ounces, and the 3.0-Liter measures 9 x 17.2 inches and weighs 6.5 ounces. Manufacturer’s limited lifetime warranty. Made in the USA.