Vegetable oil, blueberries, butter: (IMAGE) University of Bonn Caption Whether or not we choose something at the supermarket also depends on how environmentally friendly we think the packaging is. Credit Image: Janine Macht/University of Bonn Usage Restrictions This image may be used together with the press release. License Original 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.