Dr. Alex Stiles is on a mission to turn waste into something durable, valuable, and eco-friendly. His company, Vitriform3D, is breathing new life into discarded glass— showing the world that used glass is not trash.teknovation.biz readers may already know about Vitriform3D from its participation in Cohort Six of the Innovation Crossroads program at Oak Ridge National Laboratory (ORNL). Through the support of the U.S. Department of Energy (DOE), Stiles has been working to commercialize 3D printing using recycled glass for a wide range of applications. But since completing the program, his focus has narrowed—he’s now using glass waste to 3D print exterior cladding, a durable material used on the outside of buildings.