9 cups water
2 cups white sugar
1 (12 fluid ounce) can frozen orange juice concentrate
1 (12 fluid ounce) can frozen lemonade concentrate
2 cups gin
In a saucepan, combine water and sugar. Bring to a boil and let boil for 15 minutes. Remove from heat and allow to cool.
Stir in the orange juice concentrate, lemonade concentrate and gin. Pour into a plastic container and freeze overnight.
To serve, scoop 1/2 cup slush into a glass and top with lemon-lime soda.