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The Importance of a Coffee Filter Machine You should use clean, fresh and filtered water to get the best results. This allows the complex flavor of coffee beans to shine through. A filter machine is more cost effective in the long run, because you just need to buy filters made of paper and ground coffee. You could also reduce the cost of cleaning and disposal. Filtered Water Many coffee and espresso machines come with their own filter system. Others use reusable filters, such as the most popular, Brita. Whate