This is a special type of refrigerated container which can maintain the temperature of the cargo at approximately -65°C. At approximately -62°C, the "eutectic point" is reached, i.e. as of this temperature, all the water in a product is completely frozen. No microbial activity can occur when there is no free water, and therefore the product does not suffer any further loss of quality. At these temperatures, the product has an infinite storage life.