Plastic is a manufacturing staple integral to the modern world. An outright ban is simply unfeasible. A sustainable solution lies in an unexpected place—the atmosphere or, more specifically, in carbon dioxide, the other villain of the modern world.
We can learn a few things from Mikhail Kalashnikov. His genius was to design a product—the AK-47—with intentionally loose tolerances that would still function and could be manufactured and maintained with the technology at hand. Instead of designing for precision, he designed for functionality.