How Do Drip Filter Coffee Machines Work? You may be surprised by the sheer number of components in this type coffee maker, especially if you're not familiar with it. It starts with a reservoir with water tubes leading up to it, and a heating element inside that warms the water. https://coffeeeuk27628.ageeksblog.com/29682923/the-companies-that-are-the-least-well-known-to-keep-an-eye-on-in-the-drip-coffee-industry