With the USB Cup Warmer you will never be left with a cold drink again! Go into your company meetings without worrying about your drink turning cold. Keep your coffee, tea or beverage warm throughout the day by using the included stainless steel cup with lid and cup holder/warmer. The USB Cup Warmer is powered entirely by your USB port and requires no batteries. It works with all computer platforms including PCs and Macs. The included 4-foot USB cable lets you place the USB Cup Warmer in an open location on your desk or if you choose, connect the Cup Warmer holder directly to your computer. The stainless steel lid keeps your beverage safe from spills and keeps your drink warm.