The Litter-Robot is consistently rated the best automatic self-cleaning litter box on the market. Its unique design allows it to work with any clumping litter and standard garbage bags. The Litter-Robot automatically cleans itself after each use, ensuring that your cat will always have a fresh and clean litter box. With the Litter-Robot, the laborious chore of scooping a litter box is reduced to simply throwing out and replacing the waste bag once a week.