Purchased from a pet shop and kept in a stag beetle breeding case. [Photo 9] The hole in the middle was naturally formed from the beginning, and I slightly shaved it to perfectly fit the jelly. It always climbed there to eat the jelly. Washed thoroughly with water and a brush, without using detergent, and then dried well. Please check the size in Photo 10 and later. If you have no questions, you can buy it immediately. Please check my profile.