In a cocktail shaker, combine the gin, lemon and lime juices, rich simple syrup, egg whites and orange blossom water.

Shake until egg whites become frothy, about 15 seconds.

Add the cream and a few ice cubes to the shaker.

Shake for 10 to 12 seconds

Pour the club soda into the shaker, then carefully strain contents into a chilled 12-ounce collins glass.

Serve without garnish.