Mix all ingredients together, until sugar is dissolved.
Pour into glass bottles using a funnel, until about 7/8 full.
Drop 2 - 3 raisins in each bottle. Screw tops on.
Allow to stand for 24 hours and then refrigerate.
After 2 days serve chilled.
It will keep for quite a few days in the fridge, but it does get stronger as time goes by!