The Velocity (TM) is our lightest reservoir series. Balanced and comfortable, there 's a size to fit any adventure - hike, bike or run. The minimalist design and ultralight materials shed weight, the Comet (TM) bite valve delivers flow, and the wide opening makes adding ice easy. Our Plug-N-Play (TM) connector quickly separates the tank from tube for filling and cleaning. HydraPak Velocity 2L reservoir | Crystal (Clear) | Christy Sports