With the Rambler® 20 oz Tumbler, your beverages will stay ice cold or piping hot longer. YETI® over-engineered these double-wall insulated tumblers with an 18/8 stainless steel body, which means your drink still keeps its temperature no matter how much of a beating this cup takes. The Rambler® is BPA-free, has a No Sweat design to make sure your hands stay dry and is dishwasher-safe.