These are prin cups made with Kawara mushroom substrate using Quercus serrata (Japanese oak) wood, suitable for Kawara species such as *Odontolabis siva* and *Chiasognathus granti*. These are self-filled and formulated with trehalose, soy protein, and other ingredients to suit first instar larvae. I prepared a large quantity, but the number of larvae I obtained was small, so these are unused and have been stored. (Made on December 22, 2025) This is a set of 20. Cup Dimensions: Height: Approximately 45mm Diameter: Approximately 100mm