This is a homemade plaster nest. If desired, 8mm, 10mm, or 12mm holes can be made on the sides. A 5mm 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 Small food dish: ¥100 Large food dish: ¥250