Another bio type use for 3d printers
http://www.kurzweilai.net/3d-printed-microscopic-cages-confine-bacteria-in-tiny-zoos-for-the-study-of-infections?utm_source=KurzweilAI+Daily+Newsletter&utm_campaign=419d9ddde2-UA-946742-1&utm_medium=email&utm_term=0_6de721fb33-419d9ddde2-282032326