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 brew. Experts from the Good Housekeeping Institute recommend models that brew at a minimum pressure of 9 bars in order to get the best extraction. https://www.coffeee.uk/products/ihomekee-3-5bar-espresso-and-cappuccino-machine-black