Made from medical-grade, gamma sterilized polystyrene Ventilation ribs on the lid allow for air circulation Manufactured in a state-of-the-art cleanroom facility Packaging features a UPS™ shippable outer carton to prevent damage Product sleeve is made from a strong polymer to prevent bag holes Dishes packed in easy-open product sleeve with tear notch Product sleeves are vacuum sealed to prevent scuffing and other damage to dishes Complete manufacturing traceability with use of both the lot number on the case label and the lot ID number on the product sleeve