What state has a law on the books that prohibits person from sipping carbonated drink while lecturing students in school auditorium?

There is no state in the United States that has a law specifically prohibiting someone from sipping a carbonated drink while lecturing students in a school auditorium.

This type of regulation would likely be considered too trivial and unnecessary to be codified into law. School district policies or individual school rules might address appropriate behavior during lectures, but a state-level law on this issue is highly unlikely.