Mammoth 30 Ounce Stainless Steel Insulated Tumbler with Lid, Sea Foam Sea Glass Tumblers, Set of Four Frontgate 30 Oz Tumbler Seafoam YukonCR Sea You at the Beach 20 Oz Skinny Metal Tumbler w Lid and Straw. 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