Insulated shipping containers are a type of packaging used to ship temperature sensitive products such as foods, pharmaceuticals, organs, blood, biologic materials, vaccines and chemicals. They are used as part of a cold chain to help maintain product freshness and efficacy..The very principle behind insulated shipping containers is the cooling method used to lower the temperature during the journey. There are a large number of options available for various types of goods. ... These blocks lower the temperature, after which insulation materials keep the temperature constant.