For a non-alcoholic version, substitute the vodka with an equal amount of sparkling white grape juice or cranberry juice. Adjust the sweetness to your preference by adding more or less lemonade. If you are preparing the punch ahead of time, wait to add the sparkling water and ice until just before serving to maintain its fizz and prevent it from becoming watered down. Consider freezing some of the berries to use as ice cubes – they'll keep the punch cold and add a burst of flavor as they thaw.