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 – The leakproof, angled Fast Flow Lid is designed for quick and easy pouring, drinking and cleaning. AeroLight featherweight technology for on-the-go transport, and our double-wall vacuum insulation to keep your water refreshingly cold for hours. This size is not car cup compatible - compatible sizes are 16oz& 24oz