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 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