Buying an Espresso Coffee Machine Espresso machines heat the water to near boiling. They then push it under a high pressure through tightly packed ground coffee in portafilters. They also supply steam for milk-based drinks. Most espresso makers come with adjustable settings for the size of the drink and strengths. https://wwwcoffeeeuk75653.get-blogging.com/30317729/20-fun-details-about-best-ground-coffee-for-espresso-machine