High Quality Desk Mug Warmer

Light weight and compact size, easy to carry and suitable for most stainless steel cup, feeding bottle, ceramic cup, glass cup, etc. Keep coffee, tea or other hot drinks to 80 degrees Celsius, no need to worry about high temperature and high oxidation, safe to use. Powered by any devices with output 5V USB port, such as your computer, desktop, laptop, tablet, mobile power and so on, easy and convenient.