How Do Drip Filter Coffee Machines Work? If you're not familiar with this kind of coffee maker, you may be surprised to find it has a lot of parts. It starts with a reservoir, with water tubes leading up to it and an internal heating element that heats the water. https://www-coffeee-uk00081.techionblog.com/30457854/what-you-should-be-focusing-on-improving-drip-coffee