The Columbia cocktail! The secret of the perfect Colombian flag cocktail is the art of layering. First shake the vodka, the lemon juice and the orange juice. Strain this into a highball glass. Next slide the grenadine down one side of the glass. This will sink to the bottom. Do the same gently with the blue curaçao on the other side of the glass. It should place itself between the grenadine and the vodka with orange and lemon juice. Serve your Colombian cocktail before the layers start shifting. Enjoy!