Making a lot of coffee creates a lot of used coffee grounds. In fact, it creates three pounds of used coffee grounds just to make one keg of cold brew, six pounds of coffee to make one batch of cold brew concentrate, half a pound of coffee for each batch of Ruca house blend we brew up and then there is each puck of espresso for each and every espresso drink. That adds up very quickly, especially when you’re brewing coffee from 7am until 6pm daily!