In a large pitcher, combine the club soda and heavy cream. Stir gently to mix without losing too much carbonation.
Add the vanilla extract and mix again.
In four tall glasses, add ice cubes to fill each glass halfway.
Pour ¼ cup of raspberry syrup into each glass, followed by ¼ cup of the club soda mixture.
Slowly pour ¼ cup of blue raspberry syrup into each glass, allowing it to settle at the bottom for a layered effect.
Top each drink with whipped cream and garnish with fresh raspberries and blueberries.
Serve immediately and enjoy the refreshing flavors!