In a blender, combine strawberries, raspberries, and apple juice concentrate. Cover and blend until smooth. Strain through a fine-mesh sieve; discard pulp.Advertisement
Pour strained mixture into a small pitcher; slowly stir in carbonated beverage. Serve over ice cubes in chilled glasses. Makes 4 (6-ounce) servings.
If desired, make berry ice cubes. Fill the compartments of an ice-cube tray with fresh quartered strawberries. Fill with water. Freeze until firm.