Buying an Espresso Coffee Machine Espresso machines heat water to near-boiling and then force it through tightly-packed ground coffee in portafilter baskets under pressure. They also supply steam for milk-based drinks. Most espresso makers include programmable settings for drink sizes and strengths. They may also feature proportional-integral-derivative (PID) temperature controls, https://www-coffeee-uk06337.glifeblog.com/29161253/7-simple-secrets-to-totally-refreshing-your-best-ground-coffee-for-espresso-machine