Engineers at the Vienna Institute of Technology have created what they claim is the world's smallest 3D printer, one that could conceivably be sold as a consumer product so pretty much anyone could print out small objects for themselves.
The printer creates objects using "a special kind of synthetic resin that instantly and precisely hardens when hit with an intense beam of light." You simply give it a 3D file for reference, and It'll make you a new ring or cork or doorstop or whatever else you need in a pinch.
Sure, it doesn't seem like the most practical thing in the world, but I'm sure there are plenty of uses for custom-made hardened resin objects that we'll discover in the coming years.
Via Pop Sci