packaging material designed to protect milk from light, oxygen & microbial contamination, maintain freshness & quality. aseptic packaging benefits: extended shelf life, improved food quality, convenience, nutritional preservation, reduced food waste, sustainability & versatility. main material is paperboard, provide stability, strength & smoothness to printing surface. polyethylene protects against outside moisture & enables paperboard to stick to aluminum foil. aluminum foil protects against oxygen & light to maintain nutritional value & flavours of milk in ambient temperatures