Soap Films Contained within Flexible Loops (image) Okinawa Institute of Science and Technology (OIST) Graduate University Share Print E-Mail Caption Soap films contained within a flexible loop exert a force on the loop, causing it to change shape. For instance, the same loop can form a star shape or a swan shape depending on the surface tension of the soap film. Credit OIST Usage Restrictions None Share Print E-Mail 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.