The PetSafe, ScoopFree® Sensitive Crystal Litter Trays 3-Pack is very convenient to use. They are easy to store, right on a shelf. No big bulky, heavy bags of litter. 
 The trays are self contained in a leak proof box, which also come with a lid. They are super easy to change out and the crystals are dust free, which is great for the cats as well as their humans. There is nothing worse than that dust in your face. The crystals absorb not only the liquid but the odors as well. When it comes time in about a month or so, after removing from the tray from the litter box, just put the lid on and toss it in the trash. No muss, No fuss!