A cafetière is a type of coffee pot that has a disc with small holes in it attached to the lid. You push the lid down to separate the liquid from the ground coffee when it is ready to drink.
cafetiere in British English
(ˌkæfəˈtjɛə, ˌkæfəˈtɪə)
noun
a coffeepot in which boiling water is poured onto ground coffee and a plunger fitted with a metal filter is pressed down, forcing the grounds to the bottom