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