The black bowls wer his hides when he was smaller. He does not fit in them at all now but he still likes coiling up under them and using them as a hat. I learned once some time ago that he dosent like me switching up his hides, I put a bigger one in awhile ago and he got on top of it, like he was showing it who's boss, then went to the other side and he never looked at it for 2 weeks so I took it out and put the other back. he was in it within a day.