1 (46 oz.) can pineapple juice
3 c. grapefruit juice
3 pts. cranberry juice cocktail or other red fruit juices like grenadine
6 (7 oz.) bottles lemon-lime soda
1 1/4 c. dark rum (optional)
2 trays ice cubes

Chill ingredients. Mix pineapple, grapefruit and cranberry juices in a chilled punch bowl. At serving time, slowly pour in soda and add ice cubes. Add dark rum, if you like. Makes 21 cups or 40 servings.