Buying an Espresso Coffee Machine Espresso machines heat water until near-boiling and then force it through tightly-packed ground coffee in portafilter baskets under pressure. They can also be used to make milk-based drinks. Most espresso makers include programmable settings for drink sizes and strengths. They may also feature proportional-integral-derivative (PID) https://coffeeeuk73400.topbloghub.com/36121736/10-places-to-find-coffee-espresso-machine