Coffee And Espresso Machines Espresso machines use pressure to press water into finely crushed and tamped beans. They make a rich, delicious brew. Good Housekeeping Institute experts recommend models that are brewed at 9 bars minimum for a perfect extraction. Beware of brands that advertise more pressure than is necessary. https://www.coffeee.uk/products/salter-ek3131-barista-style-espresso-coffee-machine-black