1 1/2 oz of Peach Liqueur
1 oz of Vodka
1 oz of Malibu coconut rum (or Coconut Rum)
5-6 oz of milk
1 oz of blue curacao liqueur
Simply pour everything into a highball glass to the half filled with ice cubes and stir to a lovely ice blue colour. As a variation, you can wait with the blue curacao and carefully add it to create blue cracks in the milk at the end.