How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds via pressure. This method of brewing produces a stronger beverage than drip coffee. These machines require nine bars of pressure to extract the flavor from the ground. Espresso machines are available in https://www.coffeee.uk/products/nescafe-de-longhi-mini-me-kapsel-kaffeemaschine-black-arctic-grey