1 can (12 ounces) frozen orange juice concentrate, thawed
2 liters diet ginger ale or lemon-lime soda, chilled
In a very large bowl or bowls, combine the first five ingredients. Transfer to four 2-qt. freezer containers. Freeze, stirring several times to make slushy. Remove containers from freezer 1-2 hours before serving; stir until slushy. Stir a fourth of ginger ale into each container.