The Build-On Brick Mug LEGO-style cup is more than just a cup. It’s a coffee mug and construction set in one! Bring along a handful of your favorite building blocks. In fact, it’s compatible with LEGO, PixelBlocks, Mega Bloks, KRE-O, and K’NEX Bricks. And you can tinker with a creation while upper management drones on about things they think are important. What will your mug become? That’s up to you!