i watched a dude, who was alone, eating his burger get up from his table and walk into the bathroom with his burger, still eating it, then 3 minutes later come back out still finishing it off
this was before covid and i still think about it sometimes
left his fries and drink
he was holding the burger with the wrapper as you might imagine. i dunno if he washed his hands but if he did then he definitely would have set it on the sink counter in there, with the wrapper, of course