Grapefruit Pineapple Slush
["2 1/2 c. pink grapefruit juice", "2 1/2 c. unsweetened pineapple juice", "1/2 c. cranberry juice cocktail", "1/3 c. tequila (optional)"]
["Mix juices and tequila.", "Pour all but one cup into ice cube trays (preferably metal) fitted with dividers.", "Freeze for several hours or up to 2 days.", "Refrigerate remaining one cup mixture."]
["pink grapefruit juice", "pineapple juice", "cranberry juice cocktail", "tequila"]