Thermos TherMax® double-wall vacuum insulation provides maximum temperature retention. Unbreakable stainless steel interior and exterior ensure years of service. Product stays cool to the touch when filled with hot contents and it does not sweat when filled with cold contents. Flat-bottom design keeps it upright and spill-free. Fits in most automobile cup holders. Keeps cold liquids cold for nine hours and hot liquids hot for five hours. Available: 16-oz. Mug, 16-oz. Travel Tumbler. Colors: Black, Red.