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Drip Coffee Machines The ease of drip coffee machines and their ability to make several cups at once makes them popular. They utilize gravity and hot water to slowly extract flavor from the ground beans. They often feature a glass or thermal carafe. The top drip coffee machines have the following features: A showerhead that evenly distributes the water evenly over the grounds to ensure consistent extraction, and a water temperature that is ideal for flavor extraction (198 to 202 degF). We