Battery Color Changing Mug Category : For Home, For Men, For Women, Gamers, Kitchen, Under $20 Rainbow Drink Float Chicken Drumstick Herb Infuser Top Hat Lights Watermelon Slice Float This creative mug changes the color of the battery on it by heat sensitivity. That way you’ll know how much longer you have until you reach the cold sad end of the coffee. $8.22 Check it out
