There are two types of shakers. One is called the Boston shaker. It is a two-piece type. The lower part is the inner glass shaker, and the upper part is not just seated. You can use the two seats together. The other standard wine shaker is a three-piece type. In addition to the lower seat, there is an ice trap in between, and an upper cover. When using it, the ice trap must be covered first, and then the cover is added to prevent liquid from spilling.
