Hot drinks are meant to be hot itrsquos in the name for crying out loud be wise and use the usb cupcake mug warmer ideal for all flat bottomed mugs and metal cups the usb cupcake mug warmer is rather unsurprisingly shaped like a cupcake only this one cannot be eaten rather than eating it why not plug this cupcake in to a mac or pc usb port and put an end to lukewarm drinks easy as cake