Buying an Espresso Coffee Machine Espresso machines heat water to a temperature near boiling and then force it under high pressure through tightly packed ground coffee portafilters. They also supply steam for milk-based drinks. Most espresso machines have programmable settings to adjust the strength and the size of the drink. https://coffeeeuk77705.digitollblog.com/29609108/7-secrets-about-coffee-espresso-machine-that-nobody-will-share-with-you