Brick Mug Building Blocks Creative Coffee Cup Block Puzzle Mug 12oz

I loved the concept of this. But my only gripe is that the molding could be a little tighter. When I received mine. I put it to the test using 3 different brands of bricks. What I came across was that the male ends on the cup are almost the right fitting. As for the the female ends. They don't hold the bricks at all. Still worth a buy for the novelty though. Atleast one can still build on the male ends.