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.