Cocktail shaker

The three parts of a Cobbler shaker
Examples of shakers from the 1950s, left with spun aluminum cap, right with chromed steel cap
Men at far right are using a cocktail shaker at a tea dance in this 1920 drawing by artist-reporter Marguerite Martyn for the St. Louis Post-Dispatch.

A 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.