it's just one of those coleman porta-potty deals. so maybe 20-25 uses but I only empty it when it's full. it's really not that big a deal to do it that way, but I get that most people are probably too squeamish to do it that way. I think the directions that came with it even said to do that. if their aren't chunks it won't splatter, just pours right down. it just takes awhile for the chemicals to do their thing though. RV'ers will tend to let it fill so the chemicals have time to do their thing, rafters tend to want to empty them fast and just use the chemicals for odor control. I'm telling you though, giving things time to decompose makes the process easier and smell isn't an issue.