With the Rambler 20 oz. Tumbler, your beverages will stay ice cold or piping hot longer. We over-engineered the Tumblers with an 18/8 stainless steel body and double-wall vacuum insulation, which means that this cup can take a beating while your drink keeps its temperature no problem. They're BPA-free (obviously), have a No Sweat Design to make sure your hands stay dry, and are dishwasher-safe. Plus its crystal-clear lid lets you check your drink status in a flash. Refill, anyone?