How Do Drip Filter Coffee Machines Work? If you're unfamiliar with this kind of coffee maker, you may be surprised to learn that it has so many parts. It starts with a reservoir with a water tube leading up to it, and a heating element inside which warms the water. https://wwwcoffeeeuk05549.blogolenta.com/27321744/what-s-holding-back-the-drip-coffee-industry