Coffee and Espresso Machines Espresso machines make use of pressure to force water into finely ground and tamped beans. They produce a rich, delicious cup. 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 https://www.coffeee.uk/products/espressoworks-barista-bundle-espresso-maker-with-grinder-cups