Some people tend to burn their hands (or tongues) on hot coffee or hot chocolate, which is never fun. Other times you’ll leave a cup sitting around for longer than you realize, then take a swig of a disgustingly-cold drink. That’s never fun. This simple mug makes it blindingly obvious on how warm your drink is.

This mug is coated with a heat sensitive glaze which changes color according to the temperature of the beverage contained within. I know its not a necessity to let your mug tell you how warm or hot your drink is but it looks cool and it might save you from taking a sip of nasty coffee now and then. The asking price for one of these mugs is $25.