This is so simple, I can’t believe no-one has thought of it before. These dishwasher safe mugs say “HOT” when hot stuff is in them, and stay “COLD” when there is a distinct lack of hot stuff in them. If you put something luke-warm in them, they say, “MEH” and shake their hands in a “so-so” motion.
Here’s what I just said, but longer, from the product page:
When we first launched the OnOff Mug at the end of last year, we had no idea that it would go so ballistic. But the fact is, that everywhere people loved it and commented on it. The comment we read over and over again was this: 'why don't you make a HotCold version?' Well, we don't want to be told that we aren't listening, so here it is, ready for pre-order. The mug is ready to go in about 3 weeks time, and because the last Soupe literally sold out within days, we wanted to give you the opportunity to make sure that you actually get one! At plain sight it is a standard black mug as they come a dime a dozen and in big white letters it say COLD. Nothing fancy, but once you add the hot beverage of your choice, the mug changes color and is turning white and in big black letters it states: HOT Nifty eh? Do we need to explain more? Nah, we didn't think so, we'll just leave it to the wonders of heat sensitive pigment… Dishwasher safe of course!
[$25, Charles & Marie]
[Via Technabob]