... USB interface,Apple style, keep water /coffee/ tea / drinking warm. 2.Save Electricity,Convenient, Easily to Take. It's ... Can do ?Do Not Worry!We have this : USB Warm Coaster!Just Only 1 Step : With Your ... Hands , Put the “USB Warm Coaster” with Computer ,After Put the “Cup” ... Water ). Description: New Style of “USB warm coaster ”—— “Apple” Model. USB interface, can make the water/milk ...