Coffee and Espresso Machines Espresso machines use pressure to press water into finely crushed and tamped beans. They make a rich, flavorful brew. Good Housekeeping Institute experts recommend models that brew at 9 bars minimum to ensure the best extraction. Beware of manufacturers who claim to use more pressure than https://www.coffeee.uk/products/shardor-20-bar-espresso-machine-with-milk-frother