I general, I try to avoid plastic as much as possible but unfortunately due to my mobility issues, I am forced to use delivery people, who all use plastic.
One of these examples I have kept (actually two of the same).
They originally contained wontons in soup, but it wasn't delivered 'in' soup. The plastic containers have two internal sections. The one on the right sits inside the top of the larger one. The soup was in a plastic bag inside the lower chamber and the wontons separately in the top, allowing you to mix them yourself.
I use them on those occasions when I need to put two items in the fridge but don't want to mix them. Very useful and saves precious fridge real estate.
