LitterMaid Waste Receptacles for Self-Cleaning Cat Litter Box are specially made for use with the LitterMaid Classic Series Automatic Self-Cleaning Cat Litter Box and the LitterMaid Mega Series Automatic Self-Cleaning Cat Litter Box. These durable， heavy-gauge plastic containers seal tight to lock in offensive odors， keeping your litter box fresher， longer. Ten minutes after your cat uses the box， the LitterMaid rakes waste into the receptacle， then seals it shut until the next visit. When the receptacle is full， simply dispose of it and install a new one or clean it out and re-use. Lasts approximately 5–7 days each for single-cat homes， and 3+ days for multi-cat homes.