Coffee and Espresso Machines Espresso machines make use of pressure to force water through finely ground and tamped coffee beans. They create a rich and delicious cup of coffee. Good Housekeeping Institute experts recommend models that are brewed at 9 bars or less to ensure a perfect extraction. Beware of https://www.coffeee.uk/products/4-bar-espresso-latte-cappuccino-maker-stainless-steel