This eight ounce coffee mug changes its appearance when you pour in a hot drink. A near-empty matrix is displayed when cool, but it fills in considerably in the presence of heat.  The same game board is featured on both sides of the ceramic mug. Hand wash only.

• Brand: ThinkGeek
• Model: A-TetrisMug
• Product ID: 05055964744663

• Price: $17.97 - In stock