"Bacterio" Etched Fountain Pen, a design by Ettore Sottsass, comes from ACME Studio's Collection of Etched Pens. The design is etched into the pen and filled with a blue lacquer. The pen comes with one black roller ball refill as it can also be used as a roller ball. Artist's signature is engraved on the cap band and "ACME" is on the clip. It is presented in an black ACME metal box with a black sleeve and ACME literature.