Inventors:
Michael Russo - Wilmington MA, US
International Classification:
G01K001/14, G01K013/00, G01K011/12
US Classification:
374/141000, 374/162000, 374/157000, 116/216000
Abstract:
A coffee cup contains a temperature indicating device which informs the user as to whether the liquid within is too hot to comfortably drink, too cold, or otherwise. The temperature-indicating device is thermochromic, changing color as a function of temperature. In one embodiment, three segments are printed onto the cup lid using thermochromic ink. One of these segments changes color to indicate the liquid is cool, another when the liquid is warm, and a third when hot. In another embodiment, the cup itself is printed with the thermochromic ink, and changes color to indicate the temperature of the liquid. In yet another embodiment the material of which the cup and lid are made is itself thermochromic.