Coffee and Espresso Machines Espresso machines use pressure to push water through finely ground and tamped coffee beans. They make a rich and delicious cup of coffee. Good Housekeeping Institute experts recommend models that can be brewed with 9 bars or less to ensure the best extraction. Beware of brands https://www.coffeee.uk/products/ihomekee-3-5bar-espresso-and-cappuccino-machine-black