1 1/2 oz of Dark rum
1 splash of sweet and sour mix
1/2 oz of cointreau orange liqueur (or orange liqueur)
3/4 oz of Lime Juice
Pour the dark rum, Cointreau, lime juice and sour mix into a cocktail shaker half-filled with ice cubes. Shake well, strain into an old-fashioned glass 1/2 filled with ice cubes, and serve.