Gin and Bitter Lemon

Ingredients

 * 1 1/2 oz gin
 * 1/2 oz lemon juice
 * 1/2 tsp superfine sugar
 * 4 oz tonic water

Directions
Pour into a shaker some ice cubes, add the gin, lemon juice and sugar. After shaking, strain into a highball glass and add more ice cubes. Top with the tonic water.