From the Smithsonian.com: "Plastics and resins usually seem like the anti-sustainability. They are often made from petroleum, they rarely biodegrade, and without industrial facilities and resource extraction, they wouldn’t exist. But as technology and manufacturing advance, moldable materials are converging with sustainable design practices."
Apple Earbud Holder made with 3d printer. I have made several of these. They are a great idea for carrying the Earbuds in your pocket. I stopped using them in the car as it just took too long and was too dangerous to try to unwind or wind while driving.
Real Möbius Gear Will Melt Your Mind: This Möbius gear is absolutely mind-bending, and almost impossible to describe. It’s a toothed gear that only has one side, made by Berkeley robotics student Aaron Hoover using various 3-D printing methods. He was puzzling over an animation of such a gear in action and convinced himself that it could be made in real life. He turned out to be right.
Stunning 3D-Printed Faucets Completely Rethink How Water Flows