Coffee and Espresso Machines Espresso machines make use of pressure to force water through finely ground and tamped coffee beans. They make a rich, flavorful brew. Experts from the Good Housekeeping Institute recommend models that brew with a minimum pressure of 9 bars to get the best extraction. Beware of https://www.coffeee.uk/products/de-longhi-all-in-one-coffee-maker-espresso-machine