James Bond is notoriously famous for preferring his martini “shaken, not stirred”. The line became a ridiculously popular catchphrase as demonstrated by the video bellow. However over the last few years science-minded mixologists realised that even though shaking produces a colder, frothy and cloudy looking drink it also dilutes it as the ice breaks down into the martini. Even though stirring leaves the temperature a point or two higher it will create a silkier effect.
Stirring and shaking both chill, dilute, and blend your drink—but they have different effects on flavor and texture that work better with some cocktail recipes than others.
Typically, when you shake a drink, it will get colder, than it would be after stirring. Because flavor perception, and sweetness, a shaken drink needs to start out significantly sweeter than its stirred equivalent.