Premium taste-free 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. The Big Zip EVO is available in 1.0L, 2.0L, 3.0L & 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.
Clean Taste Guarantee: All materials are certified food-grade, BPA-, BPS-, phthalate-free and taste-free, guaranteed.