Squeeze the juice of the orange into an empty cocktail shaker, then add rum, cream of coconut and grenadine and shake. Fill pint glass with ice and pour the shaker contents over the ice. Place a tiny plastic pink flamingo on the rim and serve with a straw.
For flair, combine all the ingredients except the Grenadine and pour over the ice. Put the drops of grenadine on top, then right before serving, stir it front of your guest.