The jokes write themselves

From Dezeen, the jokes one can make from this are just too easy:

Pratt Institute graduate Garrett Benisch has proposed using biosolids, the organic matter derived from treated sewage, to produce a compostable ballpoint pen and its ink.

Benisch, who just graduated from New York's Pratt Institute with a degree in industrial design, created the Sum Waste pen for his thesis project.

The curvy, translucent writing instrument made from biosolids was featured in the university's year-end design show and won first place in a national competition organised by research group Healthy Materials Lab.