Important Parts of a Drip Coffee Machine Drip coffee makers are great for those who are looking for an instant, simple cup of coffee. They work by heating cold water in the reservoir before pouring it over coarsely crushed coffee grounds. Some drip coffee makers have an inbuilt bean grinder. https://wwwcoffeeeuk19278.blogerus.com/53129366/10-inspirational-graphics-about-drip-coffee