Coffee and Espresso Machines Espresso machines use pressure to push water through finely ground and tamped coffee beans. They make a rich, delicious cup. Good Housekeeping Institute experts recommend models that brew at 9 bars minimum to ensure the best extraction. Beware of brands that advertise more pressure than is https://www.coffeee.uk/products/smeg-50-s-retro-style-espresso-coffee-machine-cream