RIZZARI Foldable Cat Litter Box,Large Top Entry Anti-Splashing Litter Box with Lid,Enclosed Plastic Cat Litter Box with Handy Litter Scoop,Drawer Type Cat Toilet Easy Cleaning. One-Way Door: The front door of the litter box is only used for in and out, to prevent the litter spill outside, the cat could go in and out through the top door at will, which is benefitial to exercising the cat's body and increasing the fun of life.