How Do Drip Filter Coffee Machines Work? You might be surprised by the number of parts in this type coffee maker if you are unfamiliar with it. It begins with a reservoir with an air tube that leads to it, and an element of heating inside that heats the water. https://www-coffeee-uk52992.ssnblog.com/29817444/this-is-the-ultimate-guide-to-drip-coffee