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How to Properly Operate a Coffee Drip Machine While there are many ways to make a great cup of coffee, a drip machine is one of the most popular choices. These machines rely on gravity and hot water to extract flavors, oils and caffeine from beans that have been ground. The top drip coffee makers are equipped with precise temperature control to get the best brewing temperatures that are essential to extract flavor. You can also choose filters that enhance or mellow certain coffee characteristics.