Creative DIY Building Blocks Cup (Black) Material: food grade non-toxic plastic A single cup to send a packet of accessories (random 3-4 blocks) The cup body and the handle are standard interface like particles can be inserted in the above DIY a unique personalized mug Oh! In addition to Lego, but also compatible PixelBlocks, Mega Bloks, KRE-O and K'NEX and other building blocks.