You can stop burning your tongue, now. This coffee mug switches from "OFF" to "ON" when being filled with coffee (or another hot beverage of your choice). Initially, the mug is black then turns white with letters in black that say "ON." Pretty interesting, however, the lining that actually does the changing can wash off with time. With that in mind, the burning may continue.

This item is $25.00 and available at http://www.charlesandmarie.com