The bold and colourful IceFlow™ Flip Straw tumblers from Stanley are designed to keep you hydrated in a fully functional style. Ideal for commutes or workouts, this tumbler has a built-in flip straw for easy and effortless sipping. Snap it shut, and the double-wall vacuum insulation will keep your drink fully leakproof and cold for 12 hours or iced for 48 hours. It's created to fit comfortably in pretty much any cup holder, whether that of a car, a bike, a treadmill or a spin cycle! The folding handle lets you grab and go with ease. To help keep your life simple, the IceFlow™ tumblers are designed to clean easily as well. Every piece of this stainless-steel water bottle is dishwasher-safe. - Keeps your drink cold for 12 hours or iced for 48 hours - 18/8 stainless steel, BPA-free- Double-wall vacuum insulation- Leak-proof flip straw- Easy-to-carry handle- Compatible with most car and bike cup holders- Dishwasher-safe