Premium taste-free 2L hydration reservoir with 50% faster flow rate Introducing the Big Zip„ EVO€”the latest evolution in taste-free hydration from Platypus®. Delivering an extremely high flow rate, self-sealing HyFlo„ bite valve, large 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.  ·       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. ·       Clean Taste Guarantee: All materials are certified food-grade, BPA-, BPS-, phthalate-free and taste-free, guaranteed.