These light weight trays are made of durable paper mache and are ideal for use in collecting and holding eggs. Each tray holds 30 eggs and will stack one on top of the other by turning each tray opposite the one below. These trays are also ideal for use as Incubator Egg Positioners when holes are cut to permit better circulation of the air. Cracked eggs are practically eliminated when using our egg trays. Eggs Not Included.