The trillion-dollar shipping industry transports a wide variety of goods all over the globe. Regardless of whether the goods are meant to be kept hot or cold, dry or wet, packaged or fresh, this industry covers it all.
But transporting so many commodities is not as simple as filling shipping containers with various goods, and then loading them on container vessels.
What do you do if you have to maintain certain products at a sub-zero temperature?
They cannot be transported in the same container...
https://www.marineinsight.com/tech/insulated-shipping-containers/