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Drip Coffee Machines The convenience of drip coffee machines and their ability to make several cups at a time makes them popular. Gravity and hot water are used to slowly extract flavor from the ground beans. They usually have a glass or a thermal carafe. The best drip coffee makers come with the following features: showerheads that evenly distribute water over the grounds to ensure consistent extraction; and a temperature of water that is ideal for flavor extraction (198-202degF)