Introducing the Big Zip(TM) EVO-the latest evolution in taste-free hydration. The Big Zip EVO delivers a significantly higher flow rate than previous Platypus reservoirs and a host of new features, making it a great option for backpackers, hikers, and mountain bikers. Available in 1.5L, 2.0L, 3.0L. Secure SlideLock(TM): Slides both directions to easily open, securely close and fill reservoir. Handy Pincher Grip: Allows for easy one-handed filling. High Mount Quick-disconnect: Offers fast, easy access-no more digging down in your pack. Leak-proof Shut-off Valve: Instantly stops flow and offers reliable stowing. Semi-rigid Center Baffle: Offers low-profile support and makes for easy cleaning and drying. HyFLO(TM) Self-sealing Bite Valve: Improves flow along with new, larger 5/16" drink tube. Funk-free: Embedded Silver-ion protects clean water from mold & bacteria. Pure Platy Experience: All materials are certified taste-free, BPA-free, BPS-free, and phthalate-free. Tech Specs 1.5 liter 2 liter 3 liter Capacity (Standard) 50 fl. oz 70 fl. oz 100 fl. oz Capacity (Metric) 1.5 liters 2.0 liters 3.0 liters Weight (Standard) 5.6 oz 6.0 oz 6.5 oz Weight (Metric) 0.16 kg 0.17 kg 0.18 kg Width (Standard) 8.5 in 8.7 in 9.0 in Width (Metric) 21.6 cm 22.1 cm 22.9 cm Length (Standard) 13.0 in 15.0 in 17.2 in Length (Metric) 33.0 cm 38.1 cm 43.7 cm Film Polyurethane / Polyethylene Polyurethane / Polyethylene Polyurethane / Polyethylene Bite valve material Silicone Silicone Silicone Country of Origin Made in the U.S.A. of U.S. and Imported Materials Made in the U.S.A. of U.S. and Imported Materials Made in the U.S.A. of U.S. and Imported Materials