Martin Bolton made these gorgeous copper dip pens with lengths of copper pipe, standard nibs and thermoplastic adhesive. He doesn't seem to have any for sale, but I bet they're pretty easy to make with one of those wee copper pipe-cutting gadgets.
Although there are many types of pens like this available, I decided to design and manufacture my own around an existing nib. The design incorporates a standard available component (the nib) and the re-implementation of waste material (copper tubing) in its assembly. The nib was manufactured in England and purchased locally in South Africa from a stationary supplier. The bodies of the pens are cut from copper tubing from the refrigeration industry (presumably). The copper is then polished to luster, which also removes any edge burrs. The design is straight forward – the nib fits into the copper tube, and gets bonded in place with a suitable thermoplastic adhesive. A test prototype has been in use for several months and proves successful. The copper will tarnish, which can be brought back to luster if desired, with a suitable brass/copper polishing compound.