If I can't bring my coffee or water bottle to a conference room I do not want to be there, or work with people who have such stupid and unwritten rules. Exceptions of course for labs or nuclear facilities but none of these no-beverage hardliners seem to be talking about those situations
I’m sorry, but if you bring an iced coffee - or any damn beverage at all - to a job interview, you’re disqualified. It’s not hard, people.