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