7 c. water
1 1/2 c. sugar
12 oz. orange juice concentrate, frozen
12 oz. lemonade concentrate, frozen
2 c. vodka

Boil water and sugar until sugar is dissolved. Cool. Add juice, lemonade and vodka to water/sugar mixture. Pour into large freezer container and freeze. To Serve: Spoon slush mixture into glass. Fill glass half way. Pour 7-Up over slush mixture and stir slightly.