The Camelbak Crux 2 Litre Reservoir has been designed to give more water per sip than previous generations of the Camelbak reservoir. Based on feedback from athletes, customers & colleagues the Crux delivers 20% more water per sip. The Crux reservoir has a foolproof design that makes it easy to fill up & hit the trail. The It has an ergonomic handle for easier refilling, & an on/off lever that makes it easy to prevent leaks. Like all Camelbak gear, the Crux has been put through exhaustive stress tests to make sure that it won’t fail you on the trail.