ELITE ROLL 'N CLEAN SELF CLEANING LITTER BOX New and improved with chrome accents and bonus litter step to catch litter as the cat exits. The unique patented grill inside the Roll’n Clean scoops out the clumped waste, depositing it into the pull-out tray. Just roll the litter box onto its top, and roll back to the up-right position. Remove the tray and dispose of waste.