Q: When did Dining Services make the decision not to sell caffeinated soft drinks?
A: In the mid 1950s, the director of BYU Food Services decided not to sell caffeinated soft drinks. This decision has continued on since that time. Until more recently, Dining Services rarely received requests for caffeinated soda. Consumer preferences have clearly changed and requests have become much more frequent.
http://dining.byu.edu/future_dining.html