The Savic Nestor Corner Cat Litter Box is a handy, space-saving alternative to traditional rectangular litter boxes, as it fits into the corner of a room. The opening, including the swing door, can be flipped up for easy access inside the litter tray, allowing you to clean in all of the corners, without removing the cover completely. The cover can be lifted off when needed, so that you can empty the cat litter box and give it a thorough clean. Once cleaning is complete, you can re-attach the cover using the three clips.