1 oz of Light Rum
1 oz of Dark rum
1 oz of Coca-Cola (or coke)
1 tsp of anisette
1/2 oz of Lemon Juice
1/2 tsp of grenadine syrup
Combine the rums, anisette, lemon juice and grenadine in a shaker half-filled with ice cubes. Shake well and strain into an old-fashioned glass almost filled with ice cubes. Top with the cola and stir well.