Lamy's flagship fountain pen is the 2000. Designed by Gerd Alfred Müller and released in 1966, it remains in production today. The 2000 was innovative in its day for its use of a special polycarbonate resin produced by Bayer, Makrolon, for the body of the pen. It is the only contemporary Lamy fountain pen that has a semi hooded nib and is a piston fill pen offering 1.35 ml ink capacity, so thus only takes bottled ink. In addition to normal production mechanical pencil, ballpoint and four-color ballpoint versions, a commemorative fountain pen version was produced for the new millennium called the "Edition 2000", which features an inverse design of the original: a stainless steel body with Makrolon ring and polished clip.