How Do Drip Filter Coffee Machines Work? You might be surprised by the amount of components in this kind of coffee maker if not familiar with it. It starts with a reservoir that has a water tube leading up to it and a heating element inside that warms the water. https://coffeeeuk52161.qodsblog.com/30458329/7-things-about-drip-coffee-you-ll-kick-yourself-for-not-knowing