A French press has a round jug. This jug can be glass or clear plastic. The jug has a lid and a "plunger". The plunger fits in the jug very well. It usually has some kind of steel or plastic wire, that acts as a filter. Coffee is brewed by placing the coffee and water together, leaving to brew for a few minutes, then pushing the plunger down. This puts the coffee at the bottom of the jug.