Device Mold (image) University of Washington Caption The mold for making a microfluidic device. Teflon tubes are inserted into a petri dish, then silicon is poured in. After the material hardens, engineers remove the disposable container and are left with an intact device. Credit U of Washington Usage Restrictions Photo credit required. 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.