Top Entry Litterbox from Modkat
Our boys aren't the best at digging, covering, and generally scratching up their litter. William paws at the wall, and all of them have trouble covering up their business. Sometimes when they do manage to dig around in the litter, they dig and paw so hard that litter ends up everywhere. We had this problem especially in one location, so we recently replaced their old box with a top-entry box like this one from Modkat.