Made of transparent PP Plastics, environmental and durable. Each transparent plastic storage box has 28 mini compartments. The independent grid is detachable and super practical. These make working the diamond paintings so much easier to change colors quickly, a huge time saver, much better than the baggies. Both strong latches for every lids close firmly, even when dropped onto the floor, they didn't open. Perfect for storing and organizing nail art decorations, make-up, jewelry, beads, necklaces, rings, charms, glitters, tablets, pills and various other items. very easy to keep organized.