We don't have bacon often, but I made some yesterday. Now that we have given up paper towels in favor of reusable cloth, I had to find something new to blot it on when I was done. Aha -- I used coffee filter from the previous day! I emptied the grounds into the compost, tore it open and arranged the bacon on the clean side of the filter. Worked like a charm.
It's also possible to reuse coffee grounds from one day to the next. Simply add one new spoon full of coffee to the previous day's grounds and brew again. I can't tell the difference. (Only two days in a row - don't keep adding - that would be gross.)