1. Place 32 fluid ounces of filtered water plus 3 rounded tablespoons of the coffee into a non-aluminium saucepan. Stir well.
  2. Bring to boil and continue to boil for 3 to 5 minutes (stirring occasionally).
  3. Reduce heat, cover and simmer for 15 to 20 minutes.
  4. Remove from heat and allow to cool down to room temperature.
  5. Strain coffee through fine metal sieve to remove any coffee grains (discard/compost coffee grind), then make the mixture back up to 32fl oz with warm pure filtered water.