October 27th Cocktail

Ingredients:
1 fluid ounce or 3 centilitres of Light Rum
1 fluid ounce or 3 centilitres of Dark Rum
1/2 a fluid ounce or 1.5 centilitres of Grenadine (Preferably Rose's)
Fill with Coca Cola
1 fluid ounce or 3 centilitres of Dark Rum
1/2 a fluid ounce or 1.5 centilitres of Grenadine (Preferably Rose's)
Fill with Coca Cola
Instructions:
Combine over ice in a highball glass.
