Two or three gallons of distilled water. Store in the glass bottles. Do NOT use plastic bottles. The coffee acids will trigger plasticizer chemical outgassing into the water. One pound of organic coffee beans.
Commercial coffee is loaded with herbicides and insecticides.
Concentrate Procedure Grind one pound of coffee beans into regular grind sized particles, somewhat coarse particles big enough to be easily trapped in the cheesecloth filter you will make in the funnel. Dump the coffee into the stock pot. Add 2 quarts of distilled water. This measure will be used to restore the boiled off water lost in the concentrate boil. Apply heat to bring this mixture to a roiling boil for 3 minutes.