Smart Cap (IMAGE) University of California - Berkeley Caption UC Berkeley engineers created a "smart cap" using 3-D-printed plastic with embedded electronics to wirelessly monitor the freshness of milk. Credit Photo by Sung-Yueh Wu Usage Restrictions Editorial use only. Commercial use prohibited. 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.