On today’s show: the story of an often-overlooked innovation that’s essential to the global economy. The innovation is a box. A big, metal box. The standard shipping container has completely transformed commerce in the past 50 years. It’s part of the reason the Planet Money men’s T-shirt comes from cotton grown in Mississippi, spun into yarn in Indonesia, and sewn together in Bangladesh. On today’s show, we see the shipping container in action, and hear the story behind it. For much more, see the ‘Boxes’ chapter of our online T-shirt project.