This is quite a handy cat accessory, because now you don’t need to worry about throwing out the item that you purchased for your cat that came in the box, because the box itself is the item! Unfortunately for me, I have one of those kitty nail-file/scratching post things lying around, unused. My mom bought it for my sharp kitties, and they have never used it. But they do like the box:
I should sell cardboard cat boxes and get rich.