Red Currant cordial is a very easy and delicious way to use up your red currant harvest. Make sure to get the necessary common kitchen equipment, which are required to make this amazing refreshment. Holds easily over the winter for up to a year if stored in sterilized vacuum bottles and in a dry, dark and cool place.Citric Acid as well as Sorbic or Benzoic Acid can be commonly bought online. We purchase ours in Europe from the local pharmacy. The acids help in the preservation of the red currant cordial.