An etiquette expert warns that bringing iced coffee or other beverages to a job interview signals casualness and says the professionalism rule applies to all ages.
https://www.foxnews.com/food-drink/bringing-popular-drink-job-interview-could-hurt-your-chances-experts-warn
https://www.foxnews.com/food-drink/bringing-popular-drink-job-interview-could-hurt-your-chances-experts-warn