Plunger

[1] In plumbing, the term plunger commonly refers to handheld tools used to clear blockages in drains and pipes.

Plumbing plungers consist of a rubber suction cup attached to a stick (shaft) usually made of wood or plastic.

A plunger may also refer to a component of a device that generates fluid flow, such as in a medical syringe or a French press coffee brewer.

The plumbing plunger was invented in 1874[3] by New York confectioner[4] John Hawley, with the flattened rim added in 1876.

[8]In syringes, plungers are constrained to linear motion as they are pulled and pushed within an outer tube or "barrel."