The Crux Reservoirdelivers 20% more water per sip allowing users to stay better hydrated in less time so they can tackle bigger, better adventures. A brand new cap and handle boast the widest opening on the market and make cleaning and refilling easy and effortless. One end of the drink tube features the Big Bite Valve mounted to an on-off lever that creates a simple and ergonomic way to shut off water with one hand for a completely leak-proof system. The other end of the tube connects to the reservoir with the Quick Link System, allowing the drink tube to be disconnected and remain routed in the pack while the reservoir exit port automatically shuts off for leak-proof removal and fast refillsFeatures3L: 100 fluid oz., Weight: 8 oz.2L: 70 fluid oz., Weight: 7 oz.1.5L: 50 fluid oz., Weight: 7 oz.