1 (6 oz.) can frozen orange juice concentrate, thawed and undiluted
2 (6 oz.) cans frozen lemonade, undiluted
2 (6 oz.) cans frozen limeade, undiluted
1 c. sugar
3 1/2 c. water
2 c. vodka (of your choice)
2 (28 oz.) bottles lemon-lime carbonated beverage, chilled or frozen

Combine the first 6 ingredients, mixing well. Freeze mix for 48 hours, stirring occasionally. For each serving, spoon 3/4 cup frozen mixture into a tall glass. Finish filling glass with carbonated beverage. Serve at once. Yield: approximately 16 (8 ounce) servings.