The ScoopFree® disposable litter tray is the reason you can leave the ScoopFree self-cleaning litter box alone for weeks at a time. The tray is completely disposable for hands-off convenience. It is pre-filled with Premium Blue Crystals litter, which has been proven to provide unbeatable odor control. You don"t have to see, touch, or smell messy waste. Simply replace the disposable tray every few weeks, and your ScoopFree litter box is just like new. Designed for use with ScoopFree self-cleaning litter boxes. Includes 3 litter trays.