This new square refill makes scooping your LitterLocker Design or DesignPlus pail easier. Its multi-layer barrier bags lock in odors and bacteria using AIR SEAL Technology. The LitterLocker soiled litter disposal system is completely odorless thanks to its multi-layer barrier film. Soiled litter can be stored in the LitterLocker for up to 2 weeks, but can be emptied at any time by the cat owner. A refill bag can save up to 60 grocery bags and lasts up to two months. Brand new pail design fits square refills for easier scooping.