Thanks to the double wall vacuum insulated design, a full cup of nice warm, hot coffee will never boil your hand. Keep drinks cold for up to 9hours and hot drinks hot for up to 3hours. Our tumblers use superior colorful powder coating appearance, sweat proof, easy grip, the advanced technology prevents heat transfer to outer wall. Electro polished inside delivers elegant look. Wide opening is easy to clean without worrying about dirt. The shape is tapered designed , so fits most car cup holders. Welcome to custom your logo