Open-Source 3-D Printer (IMAGE) Rice University Caption Using an open-source 3-D printer that lays down individual filaments of sugar glass one layer at a time, the researchers "printed" a lattice of would-be blood vessels. Credit Jeff Fitlow/Rice University Usage Restrictions For news reporting purposes only. 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.