A salad spinner is a tool used for removing excess water from salad greens.
The greens are placed in a large strainer, which fits inside a slightly larger bowl. A lid, which contains a spinning mechanism, is placed on top. The spinning mechanism causes the inside strainer to spin rapidly and usually works by repeatedly pulling a cord or pushing a button on the lid. Centrifugal force removes the excess water from the greens in the central strainer, sending it into the outer bowl.