Yes thats right, an award winning self clean cat litter box. Just roll it, roll it back and empty the waste tray. No expensive filters or liners to buy and no large expense to purchase it. As you roll it over, in the first turn the cat litter will fall through a grating and leave the cat doodoo behind, then when you roll it back the cat doodoo will fall into the disposal tray and the clean litter will go back into the litter tray. All you need to do is then pull out the waste drawer and empty out the mess. You do need to use clumping cat litter but with the ease that you can clean this Litter Box and the money you will be saving that will be no hardship.