The eye-catching and colorful Stanley IceFlow Flip Straw Tumblers ensure that you always have enough to drink, all in a fully functional style. They are perfect for on-the-go or during workouts and feature an integrated flip straw for easy and effortless sipping. The double-wall vacuum insulation keeps your drink leak-proof and cold for 12 hours, and ice-cold for 48 hours. They also fit comfortably in your car or bike's cup holder, as well as on treadmills and spinning cycles. With the foldable handle, you can quickly grab and take them with you. To make your life easier, the IceFlow Tumblers are designed for easy cleaning. Every part of this stainless steel water bottle is dishwasher safe.