The Platypus Big Zip EVO Hands-Free Hydration System Reservoir offers an evolution in taste-free hydration. Delivering an extremely high flow rate, self-sealing HyFLO bite valve, large 5/16-inch drink tube, simple one-handed filling, easy cleaning, fast drying, quick access drink tube disconnect, leak-proof shutoff valve, and more, the Big Zip EVO is a top pick for hikers, backpackers, travelers and mountain bikers. All materials are certified food-grade, BPA-, BPS-, phthalate-free and taste-free for a clean taste. The Platypus Big Zip EVO 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.