The Aviation is a classic pre-Prohibition cocktail known for its distinct pale sky-blue color. It was created by Hugo Ensslin, the head bartender at the Hotel Wallick in New York. The recipe consists of gin, lemon juice, maraschino liqueur, and Crème de Violette. For decades, the drink was often served without the violet liqueur because it was difficult to find, resulting in a pale grey drink. However, the Crème de Violette is essential for both the floral aroma and the 'aviation' blue color that mimics the sky. With the resurgence of craft cocktails in the 2000s, several companies began importing the violet liqueur again, allowing the Aviation to regain its status as one of the most visually stunning drinks in the bartender's repertoire.