2 (3 ounce) cans grapefruit juice concentrate
1 (12 fluid ounce) can crystallized grape juice
1 (12 fluid ounce) can lemon-lime flavored carbonated beverage
In a blender or food processor, combine grapefruit juice concentrate, grape lemon-lime soda and lemon-lime soda. Pour mixture over lemon-lime soda and serve.