Buying an Espresso Coffee Machine Espresso machines heat water until close to boiling, and then force it through tightly-packed ground coffee in portafilter baskets under pressure. They also provide steam for milk-based drinks. Most espresso makers include programmable settings for drink sizes and strengths. They may also feature proportional-integral-derivative (PID) https://coffeee44494.frewwebs.com/30414616/seven-reasons-to-explain-why-coffee-espresso-machine-is-important