Here's a nice gift for a special office or school friend who's Allways chewing on his/her pen, this Earth Worm pen will make them loose that nasty habbit, guaranteed! Purchase this out-of-the-ordinary pen jacket and and just insert any standard Bic-like ballpoint and ink tube you ca find anywhere! Perfect for your business agenda, it will sure leave a memorable impression on peoples' mind, (the element of surprise...) especially if you're in the invironmental field. Order now!
Please Note: I also have the STL file for the shorter version, on demand.