Scientists in Japan develop plastic that dissolves in seawater within hours

It may seem a little far-fetched, but the scientists had in a group of scientists and reporters, and demonstrated the effect: plastic sitting in a salt water tank disintegrated in about an hour.  So if this is scalable, and if the plastic can stand up to regular handling, they may be on to something.

https://www.reuters.com/sustainability/climate-energy/scientists-japan-develop-plastic-that-dissolves-seawater-within-hours-2025-06-04/