30 oz stainless steel tumblers Reel Nauti Sea Glass Tumblers, Set of Four Frontgate Bright Sunshine Through Deep Blue Sea Tumbler With Lid And Straw 20 Oz 30 oz Insulated Tumbler Spill Proof Travel Mug with Leak Proof Lid. Stainless drinkware you will obsess over! Our new 30oz "Sea Glass" Stainless To Go Tumbler is designed for those on the move. With triple walled insulation, it keeps beverages cold for 24 hours or hot for 12, ensuring your drinks maintain their ideal temperature throughout the day. Details: Holds 30oz. Includes reusable straw Comfort grip handle Triple walled, vacuum insulated, copper lined 24 hours cold 12 hours hot Anti slip silicone base Sealed locking lid Sweat free finish Leak proof lid