Put berries in a jar and pour the vinegar over. Let stand for 6 days, shaking up once a day. At the end of the 6th day, strain the mixture to remove solids; bring liquid to a boil adding the sugar and tasting for sweetness before adding the whole amount of sugar. Boil for 1 minute or so. Pour in cruet or empty, cleaned salad dressing bottle. Made about 1 1/4 salad dressing bottles. Pete likes best on fresh spinach leaves and sliced almonds. Much better than commercial dressings.