This tray is great for catching the last bit of litter that the cats (intentionally) drag out of our litter cabinet. It has a small door in a corner on the back so you can pour the litter out when it fills. My only complaint is that the edges of the door were not rounded enough, so it made opening it difficult in the beginning. After working it back and forth for a few minutes, it rounded enough to make it slide easier. You dont want it sliding with too little effort, as that could make a mess, but it cant be impossible to move either. Other than that one small complaint, I really like this tray.