They were actually credibly made, free of many toxic additives found in other plastic products.
If any readers had uses for these things, instead of adding to the landfill load, please leave an explaining comment. This was online:
The things were made to protect film from sunlight fogging, that is why opaque plastic was used, and with no light getting in the converse was anything inside was not in plain view.
Does Kodak still even sell film retail anymore, is there any market remaining? Kodak news, here.
A final image online, doubtlessly mirroring the main recycling use people found for these things: condiments.