This product is specially designed for home, office, etc. It can be directly plugged into the USB port, which saves electricity and is convenient. Keep your coffee, tea or other hot beverage warm up to 55centidegree, do not worry about high temperature and high oxidation, safe in use. This cup warmer made of high quality aluminium materials, heating evenly, safe and durable to use. Light weight and compact size, easy to carry. As it requires little mechanical ability, it is widely used in home and office, you can enjoy a cup of hot coffee just in the break of work. Please remember: only heat preservation, not boiling water. The price includes shipping cost to CA, QTY over 3000pcs by ocean. Imprint Option: 2″ x 2″, Radium sculpture. Please order today!