What's Happening Inside Your Filter Coffee Maker? A filter coffee machine is a low-cost and easy to use machine that produces filter ground coffee. It works by heating water in an aluminum tube & then allowing it to flow through ground coffee. There are a variety of methods to filter https://wwwcoffeeeuk39989.blogocial.com/forget-drip-coffee-makers-10-reasons-that-you-no-longer-need-it-66420955