The amount of different cocktails that you can make is pretty much endless, but perhaps the most famous example of a cocktail is the classic martini. Much of that fame comes from the way that martinis are mentioned in novels and in films – particularly when it comes to James Bond or many of the classics.
At the same time, martinis tend to be popular because it is a simple cocktail. Essentially, a martini involves two ingredients, gin and vermouth. The ratio of these two spirts will vary considerably, but a classic martini is often viewed to have a 2:1 ratio of gin to vermouth or a 4:1 ratio, depending on who you ask. These are stirred with ice (and sometimes bitters) and then strained into a cocktail glass.