Every hitchhiker must have this thing. It will remind him (or her, or it) of the most important thing in the world: DON'T PANIC.
One of my experiments in modeling for 3d printing, though I haven't tested it in real printing.
Thank @TimoShch for the design, and thanks @romanhegglin for publishing over on Pinshape. Did the print using my Mod-t and it turned out really nice.
What a great thing to print for Towel Day! (http://de.wikipedia.org/wiki/Towel_Day). I altered it a bit to print it on my printer. Do you mind if I publish it on Thingiverse? (Credits to you and a link back to this site included.) Great work and thank you Roman