The Big Zip EVO hydration reservoir delivers a significantly higher flow rate than previous Platypus reservoirs and a bevy of thoughtful features. The EVO's Secure Slidelock slides in both directions, opening and closing without a fuss, while the Handy Pincher Grip allows for easy one-handed filling. When you're finished with your adventure and need to stow the EVO for your trip home, simpy flip the Leak-proof Shut-off Valve and pack it away. 

Specs

• 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
• All materials are certified taste-free, BPA-free, BPS-free, and phthalate-free
• Silicone bite valve
• Polyurethane / Polyethylene film