This is a homemade plaster nest. If you wish, 8mm, 10mm, or 12mm holes can be made on the sides. A 10mm syringe filled with plaster is included, allowing for water absorption into the plaster within the syringe without opening the lid. An additional syringe can be added as an option. Options: Additional syringe filled with plaster: ¥150 Food dish: ¥100 Large food dish: ¥250