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.

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: Instantly stops flow and offers reliable stowing.
Leak-proof Shut-off Valve: Offers fast, easy access—no more digging down in your pack.
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..