Buying an Espresso Coffee Machine Espresso machines heat water until near-boiling and then force it through tightly packed ground coffee in portafilter baskets under high pressure. They can also be used to create milk-based drinks. Most espresso makers come with adjustable settings for the size of the drink and strengths. https://www-coffeee-uk87505.activablog.com/29302005/3-ways-in-which-the-coffee-espresso-machine-influences-your-life