Build-On Brick Mug - Black Build your own mug! Are your Monday morning meetings boring? Bring a little excitement to your next meeting with the Build on Brick Black Mug! The Build on Brick Black Mug is sure to be a hit as you drink your favorite hot beverage. The build on brick mug exterior surface is compatible with most LEGO, Mega Blocks, and Kre-O bricks (not included). Do not microwave. Hand wash only. Not dishwasher safe.