The Boston Shaker is a type of cocktail shaker that consists of two parts: a metal tin and a glass or another metal tin. It is designed to mix and chill drinks by shaking them with ice. This shaker is popular among bartenders and cocktail enthusiasts for its efficiency and ease of use. The Boston Shaker is often used in conjunction with a strainer, such as a Hawthorne strainer, to pour the mixed drink while leaving the ice behind. Its design allows for a larger volume of ingredients, making it ideal for preparing multiple cocktails at once.