The Mills USB cup warmer, a safe and reliable choice, is designed to keep your coffee or other beverages warm. Made from high-quality metal and powered by USB connectivity, this cup warmer quickly and evenly heats most stainless steel cups, baby bottles, ceramic and glass cups. Please note that the aluminium plate will reach temperatures of 80°C but will not reach boiling point, ensuring your safety. For best performance, a 5V/2A USB wall adapter is recommended. Material: Aluminium, Metal Plate.