COCkTAIL SHAKER

There are at least three varieties of cocktail shakers:

Ø The Boston Shaker: A two-piece shaker consisting of a metal bottom and glass or plastic mixing glass. The mixing container and bottom are inserted into each other for shaking or used separately for stirring or muddling. A separate strainer, such as a Hawthorn or Julep strainer, are required for this type shaker if crushed ice is used. Without such a strainer, some bartenders may instead strain by narrowly separating the two pieces after shaking and pouring the drink through the resulting gap.
Ø The Cobbler Shaker: A three-piece cocktail shaker that has tapers at the top and ends with a built-in strainer and includes a cap. The cap can often be used as a measure for spirits or other liquids.
Ø The French Shaker: A two-piece shaker consisting of a metal bottom and a metal cap. A strainer is always required for this type of shaker, barring the separation method mentioned above.

COCKTAIL SHAKER

cocktail shaker is a device used to mix beverages (usually alcoholic) by shaking. When ice is put in the shaker this allows for a quicker cooling of the drink before serving.
A shaken cocktail is made by putting the desired ingredients (typically fruit juicessyrupsliqueurs and ice cubes) in the cocktail shaker. Then it is shaken vigorously for around 5 to 10 seconds, depending upon the mixability of the ingredients and desired temperature.