Coffee And Espresso Machines Espresso machines make use of pressure to force water through finely ground and tamped coffee beans. They produce a rich, delicious cup. Experts from the Good Housekeeping Institute recommend models that brew at the minimum pressure of 9 bars to ensure the highest extraction. Beware of https://www.coffeee.uk/products/4-bar-espresso-latte-cappuccino-maker-stainless-steel