Thermos products deliver what matters every time. The Stainless King Vacuum-Insulated Beverage Bottle, 40oz (Silver) creates a new chapter in Thermos' stories history with a modern line that blends the newest technology with a dash of the past. The Stainless King has a double-wall vacuum insulation for maximum temperature retention, hot or cold. The unbreakable stainless steel interior and exterior keeps the food jar cool to the touch with hot liquids and sweatproof with cold liquids.