Morrisons - ha!

I went for "Malted Milk" biscuits and saw "Nice" (notso nice IMNSHO) in clear plastic packs. So eschewing (does one chew biscuits?) "Nice" I lighted on the Malted Milk shelf, again in plastic see-through. Alas, oh alack. When I got home I discovered the shelf-stacker had made the same assumption as me. They do look similar. Now I have to return 8 miles to swap-out the correct item. But praise be to the organisation - they invited me back and would put points on my non-existent "More" card.

And just to bring it back to packaging - I save all my biscuit wrappers and take them to our SVP shop - a local green project thingy.

And just to bring it back to the OP - they did find a bacterium that eats PET (I think) in a rubbish dump in Japan and scientists at a UK Uni are trying to evolve the bug and have improved its digestion a bit, but it is early days.