At the grocery store, most foods — meats, breads, cheeses, snacks, etc. — come wrapped in plastic packaging. Not only does this create a lot of non-recyclable, non-biodegradable waste, but the thin plastic films are not great at preventing spoilage. Some plastics are suspected of leaching potentially harmful compounds into food. To address these issues, scientists are now developing a packaging film made of milk proteins that is edible.