By Amanda Kooser Coffee bean hulls take on a new high-tech life as renewable 3D printing filament. It only comes in one color, though.

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/49409d2a/sc/23/l/0L0Scnet0N0Cnews0Ccoffee0Ebased0Efilament0Eturns0Ejava0Einto0Ebrown0E3d0Eprinted0Eobjects0C0Tftag0FCAD590Aa51e/story01.htm