CamelBak Unbottle Hydration Pack - The Unbottle Hydration Pack by CamelBak turns any pack into an all-season hydration system. The Quick Zip reservoir loading fits both the Antidote and Crux reservoirs. Completely redesigned for the 2017 season, the Crux Hydration Reservoir delivers 20 percent more water per sip to power longer adventures. The Easy Open/Close Leak-Proof Cap and Leak-Proof On/Off Lever ensures there's water when you want it, and none when you don't. One-handed fills are now a summer breeze with the ergonomic Hold On handle, and the low profile Reservoir Baffle design makes it easy to load in and out of your chosen CamelBak pack. The Crux is engineered with Hydroguard antimicrobial technology to inhibit the growth of bacteria in both the reservoir and drinking tube. Speaking of drinking tubes, the taste-free PureFlow tube comes fitted with a Magnetic Tube Trap, Big Bite valve that self-seals after every drink, and a Quick Link system with an auto shut-off valve to prevent leakage during removal. Do more of what you love, longer, with the CamelBak Unbottle Hydration Pack.