Constellation Coffee Mug

Turn your favorite hot drink into a tour of the night sky. When the mug is cool, its dark exterior displays a field of stars; add a hot beverage and constellation artwork gradually appears, revealing recognizable patterns in the sky. As the mug cools, the display returns to its original appearance. Part coffee cup, part astronomy demonstration, this popular heat-sensitive mug makes a distinctive gift for stargazers, science enthusiasts, teachers, or anyone who enjoys a little discovery with their coffee.

Here is a video of it in action!