What is the meaning of Beaker?

A flat-bottomed, straight-sided, glass vessel, with a lip and often a small spout, used as a laboratory container.

A drinking vessel without a handle.

A mug.

An ancient bell-shaped ceramic pot with a wide mouth, narrow neck, and flaring body, used by the Beaker people during the late Neolithic and early Bronze Age.

A scientist.

Source: wiktionary.org