Battery Color Changing Mug Category : For Home, For Men, For Women, Gamers, Kitchen, Under $20 Minecraft Redstone Ore Lamp Animal Clothes Hanger Fill-in-the-blank Book Magic Wand Keychain 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
