Using a single ice cube tray, line each ice cube well with a mint leaf. Top with two red and two green grape halves. Cover with water and freeze for at least 2 hours.

Add mint, lime and grapes to shaker and muddle. Add the gin and cucumber slices to shaker and shake vigorously. Strain the mixture into a rocks glass filled with 3 Grape and Mint ice cubes and top with tonic water. Stir, let set for a few minutes for the flavors to enhance and enjoy.