How Do Drip Filter Coffee Machines Work? If you're not familiar with this particular coffee maker, you may be surprised to learn that it has a lot of parts. It begins with a reservoir, a tube of water that leads to it and a heating element inside that heats water. https://wwwcoffeeeuk83428.total-blog.com/the-drip-coffee-makers-case-study-you-ll-never-forget-55710629