This is a chinchilla toilet I designed myself and had made by a ceramic kiln. My chinchilla learned to use the toilet after I started using this one. The size is 20cm x 15cm, with walls on two sides, and the walls are 15cm high. I wanted walls because without them, my chinchilla would dig up the bedding and scatter it outside the cage, so I had it custom-made. If you put small animal bedding (such as hardwood mat) in it, they will recognize it as a toilet and use it there! The probability of them learning to use a toilet with a typical mesh on top is low, and putting a toilet sheet inside is dangerous because they might pull it out and accidentally eat it. It's safe to use bedding like hardwood bedding that is safe to eat. The condition is that there are no scratches or cracks, but there are stains from urine that won't come off. Color unevenness is original to the piece. I purchased it custom-made for 7000 yen.