An 18-year-old brings in $300,000 a month selling 3D printed 'reload can holders.' Here's how he comes up with unique product ideas.

"I didn't know if it was that good of an idea, but I just posted it on Instagram to see how it would do. The video went wild.
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3DExpress: Justin Bieber Launches Sneaker with Zellerfeld at SKYLRK’s Tokyo Pop-Up

Discover Justin Bieber's 3D shoe, LEGO's AMUG Keynote, 3D printed aircraft fuselage, and more 3D printing news!