Punch-bag looks like it can transform into a powerful weapon when in need!

I'd love a bag that doubles as a weapon. It would totally suit my geeky side where I can pretend that I'm a superhero with special powers via the bag. This 'Punch-Bag' is inspired by brass knuckles as is obvious after taking one look at it. I'm not sure whether the knuckles are made out of plastic or metal. It certainly looks quite different from any other bag I've seen; the material used here is a laser-sintered polyamide formed into mobius-like links that chain together.

Well I don't know if the knuckles here will hurt or not, but if you are ever cornered in a dark alley at least the bag will look like a menacing weapon! Jiri Evenhuis and Janne Kyttanen design the 'Punch-Bag' and it is available Freedom Of collection.