On/Off Mug
ON/OFF Mug
At plain sight it is a standard black mug as they come a dime a dozen and in big white letters it say COLD. Nothing fancy, but once you add the hot beverage of your choice, the mug changes color and is turning white and in big black letters it states: HOT
Nifty eh? Do we need to explain more? Nah, we didn't think so, we'll just leave it to the wonders of heat sensitive pigment… Dishwasher safe of course!
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