1 (46 oz.) can unsweetened pineapple juice (or equivalent frozen)
2 tbsp. lemon juice
1 (6 oz.) can frozen orange juice concentrate
10 oz. sparkling orange flavored water

Mix pineapple juice, lemon juice, and frozen orange juice concentrate. Just before serving, add the sparkling water. Looks nice with a frozen ice ring made of orange juice with orange and lemon slices.