It's pretty easy to defeat this. No bacteria would likely be able to indiscriminately consume all different types of plastic, regardless of the substantial diff

It's pretty easy to defeat this. No bacteria would likely be able to indiscriminately consume all different types of plastic, regardless of the substantial differences in molecular composition. It is very common in the plastics industry to make multi-layered plastics (for things like oxygen barriers to protect meat, for example), so it would be a simple task of producing film with a thin layer of nonconsumable plastic protecting the consumable material.