We are manufacturer of this kind flower beverage heater. It can be connected by normal plug to alternating current or by USB to computer.
It can be used to heat coffer, tea, soup, milk, medicine etc at home or office. It constants temperature of 70 *C(degree).
Can you image the wonderful vision: When you use computer or at home, you can drink the hot beverage at any time if you have our flower heater? Excellent!
Please kindly contact me freely if you are interested in our products!