Back in the dark ages of the early 80's, my school didn't even have vending machines. You drank water from the fountain. At lunch, milk.
Same here. I somehow got through 12 years of public school without having to rely on vending machines and cafeterias. I usually brought a peanut butter and jelly sandwich to school and drank from the fountain if I was thirsty.
That was water too....with chalk in it.