“I’ll have a rum and coke” (joke)

Can you substitute a Pepsi in a “rum and coke”? Dan Mentos made a popular tweet on November 23, 2014:
   
“I’ll have a rum and coke”
Is pepsi ok?
“Sure whatever”
*hands you a pepsi and coke*
   
   
Wikipedia: Cuba Libre
The Cuba Libre (/ˈkjuːbə ˈliːbreɪ/; Spanish pronunciation: [ˈkuβa ˈliβɾe], “Free Cuba”) is a caffeinated alcoholic cocktail made of cola, lime, and dark or light rum. This cocktail is often referred to as a Rum and Coke in the United States, Canada, the UK, Ireland, India, Singapore, Australia and New Zealand where the lime juice may or may not be included.
 
Twitter
H Anthony Hildebrand‏
@hahildebrand
- Can I have a rum and coke please?
- Sorry, we only have pepsi.
- Can I have a pepsi and coke please?
10:14 AM - 6 Oct 2013
 
Twitter
dan mentos‏
@DanMentos
“I’ll have a rum and coke”
Is pepsi ok?
“Sure whatever”
*hands you a pepsi and coke*
11:08 PM - 23 Nov 2014
 
Twitter
Antoine A‏
@sofanias317
Replying to @DanMentos
Welp. RT @DanMentos: “I’ll have a rum and coke”
Is pepsi ok?
“Sure whatever”
*hands you a pepsi and coke*
2:24 AM - 24 Nov 2014
 
pleated-jeans
15 Twitter Jokes Everyone Should Read
Posted on December 1, 2014 by Jeff Wysaski
(...)
dan mentos @DanMentos
“I’ll have a rum and coke”
Is pepsi ok?
“Sure whatever”
*hands you a pepsi and coke*
12:08 AM - 24 Nov 2014
 
Facebook
LOLism
January 12, 2015 ·
“I’ll have a rum and coke”
Is pepsi ok?
“Sure whatever”
*hands you a pepsi and coke*
 
Reddit—Jokes
So I asked the bartender for a rum and coke. He said, “Is Pepsi okay?”
submitted March 23, 2017 by ascatraz
“Sure, whatever,” I said.
So he handed me a glass of pepsi and coke.