Coffee and Espresso Machines Espresso machines make use of pressure to push water through finely ground and tamped coffee beans. They produce a rich and delicious cup of coffee. Good Housekeeping Institute experts recommend models that can be brewed with a minimum of 9 bars to ensure an ideal extraction. https://www.coffeee.uk/products/espressoworks-barista-bundle-espresso-maker-with-grinder-cups