Build-On Brick Mug with Bricks - BPA-free 12oz coffee mug - Blue Blue mug with exterior building brick surfaces. Includes small bag of building bricks to add onto your mug. BPA-free plastic. 12-ounce capacity. Not dishwasher or microwave safe. Compatible with LEGO, PixelBlocks, Mega Bloks, KRE-O, or K'NEX Bricks