Buying an Espresso Coffee Machine Espresso machines heat the water to near boiling, and then force it under high pressure through tightly packed ground coffee into portafilters. They also supply steam for milk-based drinks. The majority of espresso makers have adjustable settings for the size of the drink and strengths. https://www-coffeee-uk04163.blogpayz.com/29903797/three-greatest-moments-in-best-ground-coffee-for-espresso-machine-history