A cooking device used to brew coffee is known as a coffeemaker, coffee maker, or coffee machine. The two most popular brewing techniques use gravity or pressure to circulate hot water through coffee grinds despite the fact that there are many different types of coffeemakers. Coffee grounds are typically inserted into a paper or metal filter inside a funnel that is set over a glass or ceramic coffee pot, a kettle-family cooking pot. A different chamber is filled with cold water, which is then heated before being poured into the funnel and let to trickle naturally through the grounds. Additionally known as automated drip-brew. Espresso makers are coffee makers that pressurise water to force it through coffee grinds.