Half fill a highball glass with crushed ice.
Next pour in 1.5 measure of your favourite brand of Light Rum.
Now pour in half measure of liquid Piña colada mix, and then fill to the top of the glass with pineapple juice.
After stirring ingredients, pour in half measure of grenadine and allow to settle on the bottom of the glass (do not stir after adding grenadine)
Garnish the glass with an orange wedge, and then serve 'Mon'!