The CamelBak Omega HydroTanium Replacement Reservoir is the heart and soul of the best trail hydration systems. Always durable and leak proof, the advanced design is now stronger, tougher, and more reliable. The HydroGuard anti-microbial technology eliminates up to 99.99% of common bacteria and fungus. Featuring an extra-large opening for easy filling and cleaning, it comes with the CamelBak patented Big Bite Valve for drinking without spillage. And it's easy to use--just grip the ergonomic handle, fill to the brim, screw down the secure cap, and you're ready to go.