Coffee machines are an essential part of the coffee-making process. The term 'coffee machine' can refer to a variety of different machines, including a PRESS (5 letters) and a ROASTER (7 letters). A PRESS is a device used to extract flavor from coffee grounds by forcing hot water through them. A ROASTER is a machine that uses heat to roast coffee beans, which helps to bring out their flavor and aroma. Both of these machines are necessary for making a great cup of coffee.