Coffee and Espresso Machines Espresso machines use pressure to push water through finely ground and tamped coffee beans. They make a rich, tasty brew. Experts from the Good Housekeeping Institute recommend models that brew with the minimum pressure of 9 bars to get the most efficient extraction. Beware of manufacturers https://www.coffeee.uk/products/breville-one-touch-coffeehouse-espresso-latte-machine