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How to Properly Operate a Coffee Drip Machine Although there are a variety of ways to brew a delicious coffee, a drip machine is one of the most well-known alternatives. These machines rely on gravity and hot water to extract flavors, oils and caffeine from beans that have been ground. The best drip coffee makers feature precise temperature control to attain the best brewing temperatures that are essential for flavor extraction. They also allow you to choose a filter that will enhance or mellow certain characteristics