Buying an Espresso Coffee Machine Espresso machines heat water to close to boiling and then force it under a high pressure through tightly packed ground coffee in portafilters. They also supply steam for milk-based drinks. Most espresso machines have programmable settings to adjust the strength and volume of the beverage. https://www-coffeee-uk02119.pointblog.net/you-ll-never-be-able-to-figure-out-this-coffee-espresso-machine-s-tricks-71509017