Coffee and Espresso Machines Espresso machines make use of pressure to push water into finely roasted and tamped beans. They create a rich and tasty brew. Experts from the Good Housekeeping Institute recommend models that brew with a minimum pressure of 9 bars in order to get the best extraction. https://www.coffeee.uk/products/swan-espresso-machine-milk-frother-scandi-style-nordic-grey