
A cocktail shaker is the main tool for preparing drinks by shaking. It is used when a recipe contains juices, syrups, cream, eggs, puree, or ingredients with different densities that must be chilled, diluted, and combined quickly. Ice and ingredients are added, the shaker is sealed, and the drink is shaken vigorously, usually for 8-15 seconds. Carbonated drinks should not be shaken: pressure can force the shaker open and ruin the texture. The main shaker types differ by construction. A Boston shaker has two parts: a metal tin and a second tin or glass; it is fast, spacious, and requires a separate strainer. A cobbler shaker has three parts with a cap and built-in strainer; it is beginner-friendly, but can become hard to open when cold and strains less finely. A French shaker has two metal parts, looks elegant, and also needs a separate strainer.