I despise cleaning the box, so I’ve been using the nature’s miracle disposable boxes for a long time. However, it is almost impossible to find them locally, much less at a low price, and after recently ordering a batch and then disposing of an ungodly amount of cardboard and plastic packing materials, I am thinking I may go back to a regular box. I could replace it every six months for about the same cost as the disposables, but then I’m throwing away plastic instead of cardboard (though my order from petco also came with a bunch of air bubble type plastic packing). Kitties are bound to mess up the sides of the box so I’ll probably have to clean it fairly regularly even if I replace it often.