On/Off Coffee Mug
Posted by Algonkin in Everything Else on December 3, 2007 at 10:28 am
This clever mug automatically displays “OFF” when it is empty and ‘ON” when it is filled with coffee or tea. It is covered with a heat sensitive pigment which allows it to change from black to white or vice versa depending on whether it is filled or not. Charles & Marie are now selling the mug for $25.
Via: Charles & Marie
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