Preparation Combine thawed raspberries with syrup, strawberries with syrup, and lemon juice in processor. Purée until smooth. Strain liquid into pitcher; discard solids in strainer. Add cherry juice and vodka. Stir well. (Can be made 6 hours ahead. Chill.) Stir sparkling water and ice cubes into pitcher. Pour cooler into cocktail glasses. Garnish with mint, if desired.
Preparation Combine thawed raspberries with syrup, strawberries with syrup, and lemon juice in processor. Purée until smooth. Strain liquid into pitcher; discard solids in strainer. Add cherry juice and vodka. Stir well. (Can be made 6 hours ahead. Chill.) Stir sparkling water and ice cubes into pitcher. Pour cooler into cocktail glasses. Garnish with mint, if desired.