Your Purchase Supports Scientific and Educational Endeavors at the
American Museum of Natural History.
Light Your Own Path Heat-Changing Fireflies Mug
At first this seems like just a plain black mug with the text "Light Your Own Path" encircling the top but when you add a hot beverage it magically glows with fireflies and the Museum's 150th anniversary logo. The ceramic mug holds about 10 oz. Hand wash for safety.