Buying an Espresso Coffee Machine Espresso machines heat water until close to boiling, and then force it through tightly-packed ground coffee in portafilter baskets under high pressure. They can also be used to make milk-based drinks. Most espresso makers come with customizable settings for different sizes of drinks and strengths. https://www-coffeee-uk90300.angelinsblog.com/29348358/how-coffee-espresso-machine-is-a-secret-life-secret-life-of-coffee-espresso-machine