Why upgrade to a CamelBak Mil Spec Crux reservoir when an old reservoir will last forever? Because CamelBak never stops innovating. The Crux reservoir delivers 25% more water with every sip in a pack loaded with the latest in hydration technology!FeaturesPurpose-built reservoir so you can stay hydrated and hunt longer.25% more water per sip so you stay better hydratedQuick Link Hydrolock: Easy one-handed on/off water flow with Quick Link modularityHydroguard Technology: Inhibits growth of bacteria on reservoir and tube surfacesInsulated Tube Cover: Maintains water temperature and protects the tube from harmful UV raysAngled Exit Port: Optimized for attachment on in-line purifiers and accessoriesSelf-Sealing Bite Valve: Self-seals after each drink to eliminate dripsEasy Open Cap: Keeps your drinking port clean and leak-proofErgonomic Fill Handle: For comfortable, easy filling