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.
 
Capacity: 8 "cups" / 40 ounces
Wood Collar Style includes a polished wood collar with leather tie.
Glass Handle Style includes a graceful but sturdy glass handle.
Has no moving parts and will work forever, unless it is dropped or in some other way destroyed.