[webmaven]

> ~1970 was the beginning of the rapid growth of commercial intermodal containerization. A couple of WTO charts in this[1] document show the trend. The US military pioneered standardized containers (for shipping supplies to S. Vietnam) in the late 1960's and the commercial world caught on very quickly.

I have a feeling that use of expanded polystyrene foam (colloquially styrofoam, which is actually a brand name for a different material), as a packing material had a great deal to do with the trend as well. Loose foam packing peanuts were patented in 1965, I'm not sure when foam cushioning blocks were introduced.