Coffee And Espresso Machines Espresso machines use pressure to push water through finely ground and tamped coffee beans. They produce a rich, tasty brew. Experts at the Good Housekeeping Institute recommend models that brew at a minimum pressure of 9 bars to get the most efficient extraction. Beware of companies https://www.coffeee.uk/products/tower-cavaletto-espresso-maker-with-frother-800w