Glass pens? You got it, these things are made entirely out of glass. Handmade in France, each one is unique and a piece of art. They were all the rage in the mid-17th century, back when J. Herbin first started making fountain pen ink (circa 1670). Sure, they're not the most practical pens in the world, but they are novel, beautiful, and have a very functional purpose for the fountain pen enthusiast.