Instant hydration is yours. Stanley combines the best of the best - the IceFlow Flip Straw Tumbler and the AeroLight Transit Bottle, now with a Fast Flow Lid wide mouth design for quick and easy hydration.Great for your studio or gym workouts - everything from boxing to weight training. Work up a thirst and find quick refreshment with Fast Flow. The leakproof, angled Fast Flow Lid is designed for quick and easy pouring, drinking and cleaning. Snap the cap into the handle's integrated holder for storage while you drink. Featuring the easy-carry handle of our IceFlow, AeroLight featherweight technology for on-the-go transport, and our double-wall vacuum insulation to keep your water refreshingly cold for hours.