This refreshing drink starts out with a simple syrup. You can store the syrup in an airtight container in the refrigerator up to two weeks.
1 1/2 cups fresh lemon juice
1 cup fresh lime juice
1 cup fresh orange juice
1 (25-ounce) bottle lemon-flavored sparkling water, chilled (about 3 cups)
Combine first four ingredients in a large pitcher, stirring well. Stir in sparkling water just before serving. Serve over ice.