Maxway&reg; 18-Ounce 500ML Stainless Steel Vacuum Insulated Thermos Cup Travel Mug (Pink) Built-in stainless steel cup lets you enjoy your beverage anywhere Vacuum insulation keeps liquids hot for 20 hours and cold for 24 hours. Leak-proof drink lid with hygienic cover and easy push button lid seals. Convenient twist and pour stopper makes serving simple With extra grip on the bottle cover, convenient to handle and drink.