Coffee And Espresso Machines Espresso machines make use of pressure to press water into finely crushed and tamped beans. They create a rich and delicious cup. Experts at the Good Housekeeping Institute recommend models that brew with the minimum pressure of 9 bars to ensure the highest extraction. Beware of https://www.coffeee.uk/products/philips-black-espresso-machine-with-4-coffee-settings