●VACUUM INSULATED - This 16oz tumbler is made with ThermosTM vacuum insulation technology for maximum temperature retention. It keeps your drinks hot for 7 hours and cold for 18 hours. ●DOUBLE WALL STAINLESS STEEL - This 3.3" x 7.8" tumbler is made from a durable, high quality double wall stainless steel. The outer side stays cool with hot drinks and sweat-proof in the cold. ●LEAKPROOF LID AND TEA BAGS HOOK - Our mug comes with a DrinkLock lid that is leak-proof when closed and properly assembled. It also comes with built-in tea hook that holds tea bags or most loose tea strainers. ●FITS MOST CAR CUP HOLDERS - This cup fits most car cup holders and is compatible with most single cup brewing systems. ●International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.