Coffee And Espresso Machines Espresso machines use pressure to push water through finely ground and tamped coffee beans. They make a rich, flavorful brew. Experts at the Good Housekeeping Institute recommend models that brew with a minimum pressure of 9 bars in order to get the best extraction. Beware of https://www.coffeee.uk/products/smeg-ecf01whuk-espresso-coffee-machine-retro-style-white