The CamelBak Crux 100 Oz Water Reservoir is a large water reservoir for hydration on the go. The brand-new design 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. The reservoirs have been through exhaustive stress tests to make sure they won't fail on the trail. 100% free of BPA, BPS and BPF.