0 Gently muddle cucumber slices in the bottom of a cocktail shaker with lemon juice.
1 Add gin and elderflower liqueur to the shaker.
2 Add a handful of ice cubes to the shaker. Firmly secure the lid and shake for 30 seconds to combine and chill the ingredients.
3 Use a mesh strainer to double strain the cocktail into a chilled glass.
4 Top with a few ounces of club soda.
5 Garnish with a cucumber ribbon or a lemon wheel.