Which edible food packaging material was developed from milk proteins by USDA researchers and is being adopted by several major food companies?

The food industry is rapidly evolving its packaging approaches to address environmental concerns while maintaining food safety and quality. This trivia question explores an innovative sustainable packaging trend that's reshaping how food products appear on retail shelves. Test your knowledge of these cutting-edge developments in the food packaging industry!

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Casein film coating
Alginate wrap
Zein corn protein sheet
Mycelium membrane