Ultimate Direction Hiking Hydration Packs
There are reservoirs, and then there's the Ultimate Direction reservoir.  It's made from a true "hydration…keep me drinking" company that has the know-how and engineers to make things work for any performance activity.  It's made from premium materials and is easy to fill and clean.  The patented slide seal gives you a wide mouth opening for easy fill and cleaning/reversing.  The fast sealing slider will quickly seal the reservoir when slid across the length of the opening.  The Hydraflex Tub is made from 100%TPU tubing (no PVC) that drapes better over the shoulder, while still providing strength and resistance to kinking.  The Plug N Play connector is a removable press fit tube connection that makes for easy cleaning.  The entire reservoir is PVC and BPA free and offers a lifetime guarantee against leaks.  Surge valve, HydraFlex, and Plug N Play are Hydrapak LLC Trademarks.