1 lg. can unsweetened pineapple juice (46 oz. can)
2 (12 oz.) cans frozen pink lemonade concentrate
1 (12 oz.) can limeade concentrate
3 (12 oz.) cans water
2 qts. lemon-lime carbonated beverage

Mix juices, chill. Just before serving, pour over ice. Add water and carbonated beverage. Yields 50 medium size punch cups.