You will need an old-fashioned (or new) cream or soda siphon for making this drink.
Enough for 1 glass.
Place the blueberries in a cream siphon and add two CO2 cartridges. Leave to stand for 20 minutes. This allows the blueberries to be filled with filled with carbonic acid.
Fill a shaker with ice and add all the ingredients.
Shake well and pour into a cocktail glass. Add the carbonated blueberries to each drink.