perfect mug till coffee lover

This is really a fun thing to those coffee lover. This mug designed by Russian design studio " Art Lebedev". It shows if your coffee is warm or not. Perfect! I love the motive, coffee should drink when it's hot not cold. Winter season this is a prefect timing to produce it and have at home.

The green light in the side light up if the water(or coffee) is warm than 36 degree.