Pierce the eyes of the nuts with a screwdriver and hammer and strain the coconut milk into a bowl (makes approx. 500 ml). Add the condensed milk, rum, sugar, cinnamon and nutmeg to the coconut milk and stir until the sugar is dissolved. Place in the refrigerator for at least 2 hours and / or stir in ice cubes. Pour the Sky Juice into the coconuts using a funnel, put straws in your eyes and serve.