I got this recipe from the Martha Stewart website. With a twist to that favorite tropical pina colada cocktail, this becomes the perfect Halloween cocktail or mocktail for nearly any party theme. It's acceptable even for a kids party, because you can easily prepare the drink mix without the alcohol, and it's still a tasty beverage that most kids really like. All it is simply adding a twist to that all-time favorite cocktail (or mocktail)--the pina colada--by adding a "dripping blood" effect to the glasses. These will be the perfect complement to your Halloween buffet table.