When I went to parochial and public schools it was the habit of
brown bagging your lunch with a sandwich, banana, and an
apple. However, you can buy at the school Milk. Once a month,
at the parochial school, they would open the cafeteria to serve
hot dogs on a bun.
At High School, it was all brown bagging lunches.
I got use to the cafeteria option when I started community
college. But is was expensive.