CamelBak Crux Hydration Reservoirs - The brand new Crux delivers 20% more water per sip, with an ergonomic handle for easier refilling, and an on/off lever that makes it easy to prevent leaks. Like all of our gear, we put the Crux through exhaustive stress tests to make sure that it won't fail you on the trail. 100% free of BPA, BPS and BPF. Offers 20% more water per sip Leak-proof cap is easier to open and close On/off lever lets you seal your drinking tube shut with one hand Hydroguard technology inhibits the growth of bacteria in the reservoir and tube Big bite valve self-seals after each drink, eliminating annoying drips