This three pack of dry flush toilet refill cartridges provide up to 17 flushes per cartridge and include liners, securing bands and twist ties. There is an indicator on the cartridge that lets you know when it needs to be changed. A red line appears on the material that lets you know that the cartridge has about two flushes left. This is the most sanitary system made with proprietary double-layer technology that keeps waste out of site and odors locked in. The cartridges that hold the waste help seal and contain the waste until it is ready to be discarded. The odor will be contained for three weeks or more. You can dispose of used dry flush cartridges in the regular trash. Landfills allow human waste such as baby and adult diapers, and this also applies to Dry Flush Cartridges. Waste does need to be contained in plastic bags before disposal.