Since 1981, the FDA has approved spraying a small amount of hydrogen peroxide into a packaging container, then using an air heater (like a Tutco SureHeat hot air heater with coils that resist corrosion from hydrogen peroxide) to vaporize the hydrogen peroxide resulting in a sterile container. The sterile container is then filled with a sterilized product and hermetically sealed. Aseptic filling keeps the contents of the packaging free from bacteria and other microorganisms to provide packaged products with maximum shelf life.