Temperature Sensing Sticker
Every kid eventually learns that chocolate bars and pant pockets don’t mix. At some point, we all have probably left one in either the car, our pocket, or some other hot place for too long, and when we finally open it, the chocolate has melted and turned into a puddle of brown muck.
This Japanese company has made a real slick way of (ideally) preventing this frequent occurrence by adding a temperature sensing sticker to the box. This sticker changes color according to the temperature of the air around it. While temperature-affected color changes are nothing new (some of you may remember hypercolor shirts), I think it is still an underused tool for making cheap and innovative new product features. For example, why can’t I glance at my thermostat from across the room, and tell how hot it is by what hue of red or blue it shows?
http://inventorspot.com/articles/chocolate_bar_stickers_tell_when_8515
