Litter Genie Standard Refill Cartridge for Cat Litter Disposal System, Pack of 2, 2 CTSeven layer refills with odor barrier technology locks away germs and odors for up to two weeks for one cat. *XL Pails store litter for up to three weeks The 14 foot, continuous feed bag can be tied off and discarded any time you're ready to take it to the outside trash Black warning stripe lets you know when it's time for a new bag One refill cartridge lasts up to two months for one cat Provides a convenient and hygienic way to discard cat waste,