Shaking a cocktail with ice in a cocktail shaker allows the ingredients to chill, dilute slightly and mix well together, achieving the perfect combination of taste and consistency. This might be why the cocktail shaker is the most essential tool for making delicious drinks. Whether you want to shake a tasty Cosmopolitan or stir a clean classic Martini in the mixing-glass, your cocktail shaker is certainly going to be your most used piece of bar equipment. The 3-in-1 cocktail shaker is easy to recognise as it usually consists of three parts: The shaker, a strainer and a lid. The advantage of the shaker is, that when it's put probably together, it's very easy to control, shake and strain with, due to its build-in strainer. You don't have to fear getting ice chucks anywhere when pouring.