Introducing the Big Zip™ 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 and a Lumbar 2.0L. Secure SlideLock™: 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™ 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. Capacity - 70 fl. oz / 2.0 liters Weight - 6.0 oz / 0.17 kg Width - 8.7 in / 22.1 cm Length - 15.0 in / 38.1 cm Film - Polyurethane / Polyethylene Bite valve material - Silicone Country of Origin - Made in the U.S.A. of U.S. and Imported Materials