Recycling Pencil Holder (IMAGE) Michigan Technological University Caption Light shines through the bottom of a 3-D printed pencil holder, revealing its polymer resin code for recycling. Credit Joshua Pearce Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.