4 1/2 C. water
2 (6 oz.) cans frozen limeade concentrate, thawed and undiluted
1 (28 oz.) bottle grapefruit soda
1 (6 oz.) can frozen orange juice concentrate, thawed and undiluted
3/4 C. lime juice
1 C. tequila
Combine water, both concentrates and lime juice, mixing well.
Stir in soda and tequila. Pour mixture into a freezer container.
Freeze overnight or until firm.
Remove from freezer 30 minutes before serving; stir until slushy.
Yields 3 quarts.