Keep lid tightly closed. Do not eat directly from container.
What I wonder is whether we are being educated in general table manners/hygiene or whether there is some deeper thinking here. I can hardly think that people as a matter of course eat from a container which other people will eat from as well. Do we deal here with a problem relating to self-contamination? In other words, eating from the container leaves a residue which in due course - if the container is not emptied in one go - can affect the original (sole) diner on a subsequent occasion?
The fact that I am considered an adult is both terrifying and hillarious