Known as a pristine coffeemaker, Chemex employs all of the chemically correct methods for brewing. Its hourglass-shaped flask is made entirely of glass, a chemically inert material that does not absorb odors or chemical residues and has no moving parts so it should last forever unless it is dropped or in some other way demolished. Features Made of non-porous Borosilicate glass which will not absorb odors or chemical residues: heat and shatter-resistant. CHEMEX pour over allows coffee to be covered and refrigerated for reheating without losing flavor. Simple, easy to use with a timeless, elegant design. Includes a polished wood collar with original leather rawhide. Use with Chemex Bonded Filters; FP-1, FC-100, FSU-100.