To bring that forward a generation, there was a period around 2013-2014 when vaping was brand new and schools hadn’t written any rules yet.
I remember kids vaping in class and some teachers being kinda okay with it, or at least turning a blind eye. Granted, only like 1 or 2 people in the school had vapes.
When I used to work fast food, my manager told me that the most expensive component of a soft drink is the ice. Syrup & (filtered) water are pennies, but ice requires electricity to maintain and it’s a little more expensive than you’d think.