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How to Properly Operate a Coffee Drip Machine There are a variety of ways to make a delicious cup, but a drip machine is still 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 best coffee drip makers have precise temperature controls that allow you to ensure that you get the right brewing temperature that is essential for flavor extraction. You can also select filters that enhance or soften certain characteristics