1 1/2 cups cracked ice or 6 ice cubes
4 ounces (1/2 cup) chilled pineapple juice
2 ounces (1/4 cup) chilled orange juice
2 ounces (1/4 cup) chilled fresh lime juice
2 ounces (1/4 cup) dark rum
Garnishes: pineapple wedges, maraschino cherries, orange slices, lime slices
Fill a cocktail shaker with ice, and add juices and rum. Shake vigorously to blend.
Pour mixture into a tall glass. Top with a splash of grenadine. Garnish with a toothpick skewered with fruit, if desired.