2 (1.5 fluid ounce) jiggers pineapple juice
2 liters water
1 cup white sugar
1 (64 fluid ounce) can frozen blueberries containing 1 tablespoon juice concentrate
1 quart cold water, cooled
Pour pineapple juice from freezer into a large glass, and stir.
In a large mixing bowl combine hot water, sugar, and blueberries. Pour in juice concentrate. Stir until mixture is heated through, about 5 minutes. Serve.