ThermoCafé™ by Thermos® vacuum insulated double wall stainless steel food jars keep food warm or cold for hours. Like you, we're kind to the environment so we never use copper to line our jars, we rely on state of the art technology to keep your food at a consistent temperature. The wide mouth opening is easy to fill, eat from and clean, and the outer wall design is cool to the touch with hot and sweat proof with cold. We've even got you covered with wear and tear with a protective plastic base!