How Does Machine Espresso Work? The machine espresso uses precision pressure, and a filter technology that is awe-inspiring to create the coffee you love. What exactly does it work? Espresso is made by forcing hot water under pressure through finely ground coffee. The process is similar to making drip coffee. https://www.coffeee.uk/products/de-longhi-stilosa-ec260-cr-manual-espresso-machine-1l