Save the fermented sauerkraut juice as this is a wonderful drink. Some claim, it is a great hangover cure. It can be used as an excellent starter culture for the next production. Strain the juice and pour it into dark bottles all the way to the top to eliminate as much air as possible. This juice contains all minerals, vitamins and nutrients that lactic acid producing bacteria need to start a successful fermentation. When making next batch of sauerkraut add a bottle of sauerkraut juice to shredded cabbage. The natural sauerkraut juice has little in common with commercial sauerkraut which in most cases contains added vinegar. This explains its unpleasant and acidic taste.