I don’t eat from this places anymore but what I used to do;
Macdonalds/Burger King if I brought it home (which would be most of the time) would eat it from the box, maybe put boxes/cartons on a tray to catch any salad or whatever that falls out.
KFC or other chicken shop place or kebab shop I would put it on a plate.
Cos I’m on the veggie/vegan spectrum I rarely frequent these places now, maybe i’ll get some chips from there if I’m at a services on a motorway if I want something hot but can’t remember the last time I’ve done this. I occasionally will get a salad Subway and usually will just open it out onto a tray and it off that and let the paper catch all the salad that falls out.