Tetris Heat Change Mug: Board changes when hot liquids added.

Tetris Heat Change Mug: Board changes when hot liquids added.

Trumpet your love for tetrominoes with the Tetris Heat Change Mug.<br><br>This twelve-ounce coffee mug changes its appearance when you pour in a hot drink. A near-empty matrix is displayed when cool, but fills in considerably in the presence of heat.<br><br>The same game board is featured on both sides of the ceramic mug. Hand wash only.

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Tetris Heat Change Mug: Board changes when hot liquids added.

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