There is no point. We got a lot of Amazon packages and then just throw the boxes in the floor. Whenever a nee package arrives, we throw the other box aways and give them a new one.
Currently preferred hiding and sleeping place, actually with a cat bed inside because i want them to have it comfier (That's the box my current PC Case came in, so it is pretty large):
I am discussing with myself if they would prefer a side entrance in addition to the top entrance.