Jun 15, - Regular rum works just fine! Combine coconut rum, pineapple juice, vodka, and a few ice cubes in a cocktail shaker and shake until cold. Strain into martini glasses and slowly pour 1/2 ounce of grenadine into each glass. Ingredients. 1 part coconut rum; 1 part vodka; 1 part pineapple juice; 1 dash grenadine; ice cubes. How to Mix. fill up the shaker with ice; pour pineapple juice.