Battery Design Temperature Changing Mug Cup Hot Cold Special Porcelain Ceramic Material Introducing a special temperature sensitive mug - when you pour in hot coffee or water the battery design on the mug starts charging up. You can actually see it charge starting from the bottom to the top of the battery! (please see first picture below) In the morning you can actually say to your office mates "let's power up!" :) Buy one today, perfect addition to your hip office or home dining room. Thank you for intest in our store and items：)
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