- 24 oz. grapefruit juice
- 24 oz. pineapple juice
- 1 (12 oz.) can frozen orange juice, thawed
- 1 (12 oz.) can frozen lemonade, thawed
- 1/2 cup granulated sugar
- 6 cup cold water
- 16 oz. Private First Class
- Lemon-Lime Soda
Combine grapefruit juice, pineapple juice, thawed orange juice, thawed lemonade, and sugar in a large freezer-safe seal-able container. Stir until sugar dissolves. Add water and Private First Class; stir to combine. Cover and freeze overnight.
Fill a glass 1/2- to 3/4-full with slush and fill the remainder of the glass with chilled 7-Up or Sprite. Serve with a straw.