Bottled-water consumption in the USA hit 39.3 gallons per capita past year, while carbonated soft drinks fell to 38.5 gallons, marking the first time that soda was knocked off the top spot, according to data from industry tracker Beverage Marketing Corp.
BYU said some soda machines on campus have already been switched out with the fully-loaded beverages.
"It's a big day because we can finally drink on campus what we're allowed to drink in real life", said Jepsen, a 1994 graduate.
And students seem pretty excited.
In 2012 the Mormon church clarified its policy on caffeine, paving the way for Thursday's decision. "I am so happy".
The Mormon-owned school said the change was meant to reflect changes in consumer preferences, as requests for caffeinated soda have become more frequent.More news: Why Roy Hodgson could be flawless for Palace
"I think it's a step in the right direction because I think it will lead to more acceptance and less judgment and I think if you judge you can't love", Simons says.
Caffeinated soft drinks will also be sold at sporting events that draw tens of thousands of fans. However, the post said it does prohibit "hot drinks", specifically coffee and tea. Nor should members use harmful or habit-forming substances except under the care of a competent physician.
It's called Caffeine Corner, a service that says it can deliver a cold Coke, Diet Coke, Mountain Dew or Dr. Pepper anywhere on campus within five minutes.
"Did I just buy the first-ever caffeinated Coke Zero Sugar sold in #BYU's Wilkinson Student Center?" he tweeted.