Caribbean Castaway Punch - serves 14

3 cups orange juice
3 cups pineapple juice
2 cups lime juice (from about 15 limes)
2 cups light rum
2 cups dark rum
1 cup curaçao or other orange liqueur
1/2 cup grenadine
1 block of ice or 5 cups ice cubes

Stir first 7 ingredients in large punch bowl. Refrigerate until cold. (Can be made 6 hours ahead. Keep refrigerated.)
Add block of ice or ice cubes to bowl with punch. Ladle punch into glasses.