Coffee and Espresso Machines Espresso machines make use of pressure to force water through finely ground and tamped coffee beans. They create a rich and delicious cup of coffee. Good Housekeeping Institute experts recommend models that can be brewed with 9 bars minimum for a perfect extraction. Beware of brands https://www.coffeee.uk/products/tassimo-bosch-happy-tas1001gb-coffee-machine-purple-white