Buying an Espresso Coffee Machine Espresso machines heat water to near boiling. They then push it under pressure to pass through tightly packed ground coffee into portafilters. They also provide steam for milk-based drinks. Most espresso machines have programmable settings that can alter the strength and volume of the drink. https://wwwcoffeeeuk98371.blazingblog.com/29876239/do-you-know-how-to-explain-best-ground-coffee-for-espresso-machine-to-your-mom