The Negroni was invented in a bar in Florence 20th century by Italian Camillo Negroni. He asked the bartender to strengthen his cocktail, an Americano, so the bartender replaced the soda water with gin and added an orange peel instead of the Americano's typical lemon peel. The drink of gin, vermouth, and Campari has become a popular cocktail

The first printed recipe for a Whiskey Sour appeared in the Jerry Thomas Bartenders Guide, which was the first-ever cocktail book released in 1862. A mixture of whiskey, sugar, and lemon, the Whiskey Sour used to be made with egg white, but that ingredient isn't as common anymore.

Served as an aperitivo, a light pre-meal drink, the Aperol Spritz originated in Italy in 1919. While you'd find Europeans enjoying this cocktail with Aperol, bubbly wine, and sparkling water ever since, the Aperol Spritz didn't make it big in the U.S. until the 2010s. But with only three ingredients and a light alcohol content, this easy-to-drink cocktail can now be found at brunches and happy hours around the world.

Dating back to 16th-century Cuba, the Mojito — made from rum, lime, mint, and sugar — was supposedly consumed for medicinal purposes. Eventually, it became known as the Mojito, as it first appeared in the 1932 edition of Sloppy Joe's Bar Cocktails Manual. Sloppy Joe's was a famed bar in Havana and the Mojito only consists of ingredients native to Cuba.

It has four different spirits — vodka, rum, gin, and tequila — that don't seem to go together. But mix those with triple sec, lemon juice, and cola and you've got a cocktail.