With Asobu® No Metal Taste ceramic lining so as not to interfere with your coffee's perfect flavor. Smooth, ceramic coating preserves the taste of your drink, while the vacuum-insulated stainless steel exterior keeps beverages hot all day long. The leak-proof, pop-open lid is easy to use, and fits snugly into the ceramic lining. And at 12 Oz., it fits comfortably into any standard cup holder so you can enjoy your commute just a little bit more!