Thermos Thermocafe Stainless Steel Travel Mug 15 OZ (Silver) Thermos double-wall vacuum insulation locks in temperature to preserve flavor and freshness Unbreakable stainless-steel exterior withstands the demands of everyday use Leak-proof top seals completely for carefree travel and easy enjoyment of your beverage anywhere Light and compact design Mug stays cool to the touch with hot liquids and is condensation free with cold