The J. Herbin 30ml Fountain Pen Bottled Ink . Each bottle of 30 ml has an integrated pen rest. They are known as “D bottle pen inks. The “D” refers to the old French unit of measure “la Demi Courtine”.J. Herbin was established in 1670 and is the oldest name in formal ink production in the world. It is the ink namesake used by renowned figures such as Napoleon Bonaparte and Victor Hugo of Les Miserables. M. Herbin created this line, “The Jewel of Inks”, in his shop on the Rue des Fosses Saint-Germain in Paris in 1700.