3-pack of cat litter cartridges lasts up to 90 days. If you use the Scoop Free Automatic Litter Box you already appreciate not having to scoop, clean, or refill your cat's litter for weeks at a time. Replace the touch-free litter box's cat litter with a Scoop Free Replacement Litter Cartridge, which is filled with 30 days' worth of Fresh Step® crystal litter. This set includes three Replacement Litter Cartridges. Replacing the existing cartridge is...   Show More

3-pack of cat litter cartridges lasts up to 90 days. If you use the Scoop Free Automatic Litter Box you already appreciate not having to scoop, clean, or refill your cat's litter for weeks at a time. Replace the touch-free litter box's cat litter with a Scoop Free Replacement Litter Cartridge, which is filled with 30 days' worth of Fresh Step® crystal litter. This set includes three Replacement Litter Cartridges. Replacing the existing cartridge is easy. Just slide the sanitary cartridge into the Scoop Free Automatic Litter Box and reattach the waste cover. The Scoop Free Replacement Litter Cartridge absorbs odor and moisture on contact, and after your cat leaves the litter box, the ultra-quiet Scoop Free automatically rakes the waste into a covered trap, leaving the litter bed smelling clean and fresh. The Scoop Free Replacement Litter Cartridge uses disposable litter tray cartridges filled with Fresh Step® crystal litter, which stops odors significantly better than clay litter. Just change the disposable litter cartridge every 20 to 30 days (10 to 15 days for two cats) and toss the old cartridge away without seeing, touching, or smelling messy waste.   Show Less