6 ounces frozen lemonade concentrate, thawed
6 ounces frozen limeade concentrate, thawed
1/8 cup powdered sugar
3 cups crushed ice cubes
1 liter carbonated lemon lime beverage
2 thinly sliced limes
1. Combine the lemonade and limeade concentrates, powdered sugar and crushed ice in a large freezer proof container or bag. Seal tightly and freeze for at least an hour.
2. When ready to serve, put frozen mixture in a large bowl or pitcher and add the lemon lime beverage and lime slices. Serve immediately.