We recommend using 2 filter bags for a one quart mason jar (4 cups), 4 filter bags for half gallon jar (8 cups) and 8 filter bags for a gallon jar (16 cups). Place filter bags into jar, fill jar to brim with water, seal with lid and place jar in fridge. Recommended brewing length is 18-24 hours, but brew for up to 36 hours for max strength. Once brewing is complete remove filter bags and enjoy. Some of our customers prefer it black, some prefer to dilute by a ratio of 3 parts cold brew to 1 part water/milk/cream.