Shake & Go™ tumbler provides an easier, no-mess way to prepare and enjoy your favorite drinks. The patent-pending AUTOCLOSE™ technology means 100% leak-proof shaking and mixing so you never have to stir with your straw (or finger) again. Our sweat-proof, double-wall design keeps beverages colder longer and reduces condensation. Shatter-resistant, BPA-free Tritan™ material repels stains and odors. Top-rack dishwasher safe.