1 oz of Orange Juice
1 oz of Malibu coconut rum (or Coconut Rum)
1 oz of lime flavored margarita mix (or sweet & sour mix)
6 oz of canned pineapple juice (or Prune Juice)
Pour all ingredients into a cocktail shaker half-filled with ice cubes. Shake well, strain into a collins glass almost filled with ice cubes, and serve.