Cold chain packaging refers to the use of specialized materials and methods to maintain a specific temperature range for perishable products during storage and transportation. This packaging ensures that items such as pharmaceuticals, food, and vaccines remain at the required temperature to preserve their quality, safety, and efficacy. Cold chain packaging typically involves insulated containers, ice packs, dry ice, and temperature-monitoring devices to prevent temperature fluctuations. It is essential in industries where temperature-sensitive goods must be kept cool or frozen to prevent spoilage or degradation.