Coffee and Espresso Machines Espresso machines make use of pressure to push 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 a minimum of 9 bars to ensure an ideal extraction. Beware https://www.coffeee.uk/products/de-longhi-barista-pump-espresso-machine-coffee-cappuccino-maker-black