Hydrate without hassle with the Big Zip EVO Reservoir from Platypus. Carry 2 liters of clean water on your person as you make your trek though the trees and trails. With a self-sealing bite valve and wide tubing, this Reservoir delivers a flow rate that's 50% faster than the previous model. Between its self-sealing HyFLOW™ bite valve and leakproof shutoff valve it's pretty much impossible for water to escape the Platypus unless you're drinking it! It features a high-mount drink tube that provides a quick-disconnect so it's super fast and super easy to load and unload the reservoir. And, a partly rigid baffle helps keep reservoir open for a surefire air-drying job! Take the convenience of hassle-free hydration to summer camp with you this season!