Ultimate Direction seemed to think of everything while designing this Reservoir. Its drip free HyperFlow bite valve gives a super fast flow, and the Gator clip uses a hook and loop tab so you can attach it virtually anywhere. Ultimate Direction's leak proof RollTop closure has a large opening for adding ice and cleaning. The neoprene insulated tube prevents water from warming and freezing, and a central baffle maintains the reservoir's shape for minimized slosh. The Reservoir also features FDA approved polyurethane, cleaning instructions printed on the bag as well as a volume index, a top grab loop, and a double welded perimeter for long lasting durability.