Is Your Coffee Too Hot To Drink? Get A On/Off Mug And Find Out
The On/Off Coffee mug lets you know if your coffee is hot or cold. This mug indicates its current state of mind when you pour a hot beverage into it. When the mug is empty it shows a black “OFF” display. When you pour a hot coffee or any other hot beverage in it, it gradually transforms from the black “OFF” display to “ON”.
There is a heat sensitive pigment on the mug which changes the color of the mug from black to white. This mug isn’t long lasting as the heat-sensitive plastic lining has a tendency to wash off especially when left in a wet sink. It is priced at $25.[Via-BoingBoing]
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hmm .. i will buy it for my gal ..
Chinese products，need to please contact me!