Last week I had an idea of reusing my coffee grounds. Not to save money, or filters, or time or anything. More because I get tired of emptying out the coffee grounds into our compost jar. Since we are on septic I can't just wash the grounds down the sink. Often when drinking tea I have made 3-4 cups from the same tea bag so I couldn't see there being any difference with coffee.
So I thought I'd try this little experiment. Typically I make 2 pots of coffee a day. There is some benefit of cutting waste but that is secondary.
I can't tell any difference in quality of coffee. And I drink coffee black so there is no milk or sugar to mask any unpleasant taste. When I brew the reused grounds I add half as much new grounds. This seems to work best.
In the end, as long as the coffee tastes good that's what matter. Saving dollars on coffee grounds, wasting less paper filters, and not always dumping the grounds into compost are all nice too.