“In fact, lunch is a thing of the past.”
We never had lunches in my school. Bring your own or starve. Now how hard is to grasp that concept?
Whether it was a total fiction story I do not know, but I remember reading of little schoolhouses where each student would bring something like a potato or carrot or hunk of salt beef and the teacher would cook up a stew in a large caldron for the students to eat later in the day.