Waterman is a flagship manufacturer of liquid ink pens . Founded in New York by Louis Waterman in 1884, it is one of the oldest liquid ink pen companies in the world . It is now owned by the company, Rumbermaid. The first Waterman pens were made of solid rubber and were provided with a brush (14) karat gold. It was then introduced to the Waterman precious metal industry, some of which are still in use today.