In the summer heat, sorting, stacking. The job would never be finished until Nathaniel Wyeth came along.
In 1967, Wyeth pondered whether soda could be stored in plastic bottles. After experimenting with a plastic detergent bottle that proved incapable of withstanding the forces of pressurized liquids, he realized that a much stronger material would be required. He initially experimented with polypropylene, but ultimately settled on polyethylene terephthalate as the material and received the patent in 1973.– Wikipedia