With the skid-proof cork look featured bottom design, this 16 oz. tumbler featuring the MasterCraft shield also boasts a durable, double-wall stainless steel vacuum construction with copper insulation, which allows your cold beverage to stay cold for 24 hours and at least 8 hours for hot beverages. The construction also prevents condensation on the outside of the item, includes a water resistant case, perfect for gift-giving and fits most standard car cup holders.