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Drip Coffee Machines The convenience of drip coffee machines and their ability to brew multiple cups at once makes them popular. Hot water and gravity are used to slowly extract flavors from the beans. They are usually served with glass or thermal carafes. The best drip coffee machines come with the following features: A showerhead that evenly distributes the water over the grounds to ensure consistent extraction and a water temperature that is suitable for flavor extraction (198 to 202 degrees F). We a