1 oz of Gin
1/2 oz of Dark rum
1/2 oz of Orange Juice
1/2 oz of Lime Juice
1/2 tsp of superfine sugar (or sugar)
1/2 oz of ruby port (or port)
Pour gin, rum, port, orange juice, lime juice and sugar into a cocktail shaker half-filled with ice cubes. Shake well, strain into a cocktail glass, and serve.