Grab CamelBak's Unbottle Hydration Reservoir and use it with any of your packs. This water reservoir slips inside or clips onto the outside of your backpack for easy, on-the-go hydration. CamelBak's HydroTanium reservoir includes a bacteria-eliminating compound, so you don't end up with unidentified slimy stuff floating around in your water. The Unbottle's super-strong polyurethane material and self-sealing bite valve keep water from leaking out, and an outside loop makes it easy to hang CamelBak's reservoir upside down to dry.