Begin by chilling the blue curacao in the freezer or colder place than the other ingredients

Heavily shake the two measures of White rum, teaspoon of sugar syrup and single measure of lime juice with crushed ice until thoroughly frosted, then strain and pour over large lumps of ice in a tall thin glass.

Next; top up with lemonade and wait for fizz to settle. Now comes the interesting part: make sure there are people watching as you slowly pour about a measure of blue curacao over the back of a teaspoon over the bobbing ice. let the curacao slip to the bottom and serve.

Never serve with a straw for fear that your masterpiece will be unrecognisably ruined.