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How to Properly Operate a Coffee Drip Machine There are a myriad of ways to create a delicious cup, however, a drip machine remains one of the most popular. These machines depend on gravity and hot water to extract flavors, oils and caffeine from beans that have been ground. The top drip makers for coffee have precise temperature controls that allow you to achieve the ideal temperature for brewing, which is critical for flavor extraction. You can also choose a filter that will enhance or mellow certain coffee characteristics. Control of Temperature