Move over plastic. The food of the future could be packaged in milk protein.

Researchers at the USDA have developed a new food-packaging material made out of milk-protein (i.e. casein) that is both biodegradable and edible, says EurekAlert. Compared to petroleum-based plastics, the casein-based packaging is 500 times more effective at keeping out oxygen, which could dramatically reduce food waste from spoilage.