Dyne-a-pak trays are designed for food packaging of meat, fish, poultry and other fresh produce. These packages are made of polystyrene foam - a material composed of more than 90% air and less than 10% polymer, which allows them to have a lower environmental impact compared to other packaging alternatives. These trays are recyclable in areas where polystyrene collection programs are in place. Ask your municipality if programs exist in your area.