Known as a pristine coffeemaker, Chemex® employs all of the chemically correct methods for brewing. The hourglass shaped flask of this 1 to 3 cup coffee maker is made entirely of glass, a chemically inert material that does not absorb odors or chemical residues. The Chemex® has no moving parts and will work forever, unless it is dropped or in some other way demolished. It includes an external Includes a polished wood collar with leather tie. Chemex® filters are made of the highest quality filter paper.