Sparkling apple juice can be found on the juice aisle of your grocery store.
Makes about 8 1/2 cups
1 (12-ounce) can frozen cranberry juice concentrate, thawed and undiluted
1/2 (12-ounce) can frozen apple juice concentrate, thawed and undiluted
5 (10-ounce) bottles 100% sparkling apple juice, chilled
Garnish: Granny Smith apple slices
Stir together first 3 ingredients. Serve over ice; garnish, if desired.