In supermarkets, the food section is always the busiest corner—freshly baked bread exudes a wheaty aroma, fresh meat in the refrigerator glows rosy, and frozen fruits and vegetables in the freezer are plump and bright. But few people realize that the hidden hero behind keeping these foods in their appetizing state is EVA film. Its highly transparent "visual window" allows for a clear indication of freshness, while its precise "freshness barrier" locks in delicious flavors, making it a key tool in boosting sales and reducing waste in supermarket food sections.