1 2/3 oz of Myer's Dark Rum
1 oz of white rum
1/2 oz of creme de bananes
1 oz of Lime Juice
1 oz of Pineapple Juice
1/2 oz of grenadine syrup
2 oz of soda water
1 dash of Angostura bitters
2 oz of Mandarin Juice
Shake and strain all ingredients (except soda) into an ice-filled pina colada glass. Add the soda. Garnish with fruit and a mint sprig. Sprinkle with nutmeg, and serve with straws.