The reusable is also much cheaper. It has been years since I purchased K-Cups but about $0.30 per was a pretty decent price. Which if you compare that with just brewing an 8 cup pot of coffee is astronomical.I need to look into those k cup type permanent cups where you can dunno some ground into the cup. I hate price/wasteful ness of the disposables. On demand cups just using ground from can. Though I imagine you lose out on using the filter which I still go by a study on some of the bad cancer stuff in coffee oil that gets filtered out in paper filters.