Blue Lagoon (version 3) 45 ml vodka 20 ml blue curacao liqueur 2 tsp. fresh lemon juice lemon-lime soda Build. Collins glass. Garnish with orange slice and maraschino cherry. This version of the Blue Lagoon Cocktail has so sweet and citrus taste. This drink also has great show. It is admirable drink for hot summer days, beach party or club.