Art Lebedev takes something as simple as a coffee mug and turns it into something awesome that will keep you idle, at the office.

The Art Lebedev Battery Mug features a battery patern, on the side, that shows you how hot its content is, and how much you have left. As you pour in the coffee, the green battery lights up, and stays this way as long as the temperature doesn’t drop below 36 degrees Celsius. As the liquid gets cooler, the battery indicator fades to black.

Art Lebedev’s Battery Mug can be yours for only $28. That’s pocket change for something this cool.

Popularity: 18% [?]