Buying an Espresso Coffee Machine Espresso machines heat water to a temperature near boiling. They then push it under a high pressure through tightly packed ground coffee portafilters. They can also be used to make milk-based drinks. The majority of espresso makers have programmable settings for drink sizes and strengths. https://www-coffeee-uk06337.glifeblog.com/29197321/the-best-ground-coffee-for-espresso-machine-success-story-you-ll-never-remember