thermochromic paint ideas
Mike Hawley & Jofish Kaye

Make stylish drinking glasses with concentric rings from bottom to top (cold to hot).
Have a spectrum of zones with the perfect temperatures for: ice cream, beer, champagne, red wine, yak butter tea, hot toddy, etc.
Rig it so evocative words appear, and only that word, at the right temperature. So when you put red wine in the glass at the right temperature, "Chateau Lafite Rothschild®" appears.