RTIC 20 Oz Stainless Steel Tumbler with Exclusive Splash and Spill Resistant Lid Set Includes (1) RTIC 20 Oz Tumbler and (1) RTIC 20 Oz Splash Resistant Lid 20oz. RTIC Tumblers are stainless steel, double wall vacuum insulated. Keeps Ice Longer - Holds ice for up to 24 hours. Also keeps it beverages hot longer. No Sweat Exterior - The outside stays dry. No need for a coaster. Easy Grip Base - Taller base ensures a better grip.