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. Perfect for studio or gym workouts. 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.