Coffee and Espresso Machines Espresso machines use pressure to press water into finely crushed and tamped beans. They make a rich, delicious cup of coffee. Good Housekeeping Institute experts recommend models that use 9 bars or less to ensure a perfect extraction. Beware of manufacturers that boast more pressure than https://www.coffeee.uk/products/breville-bambino-espresso-machine-stainless-steel