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Drip Coffee Machines The convenience of drip coffee machines as well as their ability to brew several cups at once makes them popular. They make use of gravity and hot water to slowly extract flavors from the ground beans. They often feature a glass or a thermal carafe. The top drip coffee makers come with the following features: showerheads that evenly distribute water evenly over the grounds to ensure consistent extraction; and a water temperature that's optimal for flavor extraction (198-202degF).