Queen Rearing Royal Jelly Cell Cups are made of high-quality non-toxic plastic, these beekeeping cell cups are durable and safe for the bee and people to use. The beekeeping cell cup is used for laying eggs to raise queens. You can use them for a long time without buying them again and again. Easy to use. You can simply put it at the bottom of a hive frame or stick it on the bars etc at will. This beekeeping cell cup can avoid the dangers of grafting, and ensure the correct age of larvae. Can be as a gift for beekeepers or people who want to raise the queen bee.