Buying an Espresso Coffee Machine Espresso machines heat water to near boiling and then force it under high pressure through tightly packed ground coffee in portafilters. They also provide steam for drinks made from milk. Most espresso machines have programmable settings to adjust the strength and size of the drink. https://wwwcoffeeeuk57250.blog-kids.com/29988452/the-people-closest-to-coffee-espresso-machine-tell-you-some-big-secrets