Any tape inside an enclosure becomes tape stuck to a python's head. They're talented that way.
If the edges seem sharp, I just heat it with a grill lighter to sort of melt the edge smoother. Don't breathe the fumes from that burning and wash it well after it's cool. I usually just use plastic cereal bowls or white plastic mixing bowls. Just cut or burn a half circle door and put it in upside down. My current set is all purple Halloween bowls.
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