How Does Machine Espresso Work? Machine espresso uses precision pressure and mind-blowing filter technology to make the coffee we love. What exactly is it? In order to make espresso, hot water is forced under high pressure through finely ground coffee. The process is similar to that of making drip coffee. https://www.coffeee.uk/products/smeg-ecf01whuk-espresso-coffee-machine-retro-style-white