This post made me recall another lunch bag crack-up:
Not sure exactly when this happened (mid-90s-ish?), but my dad's cousin's son (who you will recall from this post) returned from school and started the following exchange:
"Dad, you put a beer in my lunch."
"What?"
"You put a beer in my lunch. Why would you do that?"
"It must have been right next to the [whatever school-lunch-approved beverage he intended to throw in the bag]. What did you do with it?"