There are companies of yesteryear that sold products like this to "reroast grounds". https://www.youtube.com/watch?v=39g6utADRzs https://www.youtube.com/watch?

There are companies of yesteryear that sold products like this to "reroast grounds". https://www.youtube.com/watch?v=39g6utADRzs https://www.youtube.com/watch?v=39g6utADRzs They're awful.