The AeroPress micro-filter removes grit from coffee unlike other press-type coffee makers, which can lead to a bitter brew. The micro-filter is designed for use with AeroPress, an entirely new way to make coffee. Coffee-makers consider the ideal temperature for water and brewing time to be vital to a rich, flavorful cup of coffee. The AeroPress's air pressure method of filtering coffee is faster than other methods, resulting in rich flavor without bitterness, and gentler on the beans themselves.