The photo shows a sample shelter. This was made for reptiles using a 3D printer. To maintain humidity, gypsum mixed with charcoal and sumi ink is laid inside the shelter. The charcoal was added to suppress mold. By removing the water dish, water can be easily absorbed into the gypsum inside. The shelter's dimensions are: 135mm x 65mm x 60mm The entrance is 35mm (height) x 30mm (width) Adding a water dish is 100 yen each.