How moleculare cages work (IMAGE) Heinrich-Heine University Duesseldorf Caption Researchers succeed in constructing a supramolecular cage and loading it with pharmaceutically active cargo. In aqueous solution, ultrasound waves open the cage and release the drug. Credit HHU / Robin Küng 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.