Important Parts of a Drip Coffee Machine Drip coffee makers are perfect for those who want an instant, simple cup of coffee. They function by heating filtered cold water in the reservoir and then pouring it over coarsely ground beans. Some drip coffee makers come with an integrated bean grinder. https://coffeeeuk27557.madmouseblog.com/10899737/from-the-web-20-amazing-infographics-about-drip-coffee-maker