6 oz. can orange juice concentrate, thawed
1 c. cold water
1/2 c. orange-flavored liqueur
2 c. club soda, chilled

In large non-metal pitcher, combine orange juice concentrate, water and liqueur; mix well. Just before serving, slowly add club soda; stir gently to blend. Serve over ice. Garnish with orange slices, if desired. 8 (1/2-cup) servings.