HYDRAPAKA(R) VELOCITY IT RESERVOIR 1.5L :: Keep trucking while staying comfortably hydrated with the innovative HydraPak Velocity IT Reservoir 1.5L. Reengineered for 20% more flow new IsoBound(TM) insulation keeps water cold 38% longer without sweating in warmer temperatures. A wide opening makes adding ice to this BPA and PVC reservoir a breeze.