A viral Elon Musk tweet about putting cocaine in Coca-Cola has been framed and hung at Twitter's HQ.
A Twitter staffer shared an image of the office decorations earlier this week.
The picture appears to have replaced other tweets that previously hung at the San Francisco office.
One of Elon Musk's jokes has been printed out and hung on the wall at Twitter's headquarters, according to a current employee.
An image - with the location tagged as Twitter's main San Francisco office - shows three framed tweets displayed against a blue wall.
In the middle is Elon Musk's joke tweet from April this year: "Next I'm buying Coca-Cola to put the cocaine back in."
That original post came just two days after Musk first agreed the $44 billion acquisition of Twitter, which then took a further six months thanks to a series of setbacks including Musk himself attempting to cancel the deal.
Musk's tongue-in-cheek remark does have some historical basis, with the "Coca" part of the brand referring to the coca leaves it was originally made with - the same plant from which the narcotic is extracted.
A 1988 New York Times article explains how the first Coca-Cola brewed in 1886 was advertised as a "brain tonic and intellectual beverage," before the cocaine was removed in the early 1900s.
However, Musk wasn't the first person to jest about this. A search of tweets from the day before his post shows numerous users suggest he buy Coca-Cola to reintroduce the drug.
There were even fake Musk tweets photoshopped before the real Musk tweeted the gag himself.
But the world's richest person appears to find it particularly funny, because it's now framed on his office walls.
Musk also shared his love for the company's caffeine-free Diet Coke on Monday morning, posting an image of his bedside table with four empty cans on top.
The framed tweets were shared by a senior engineer at Twitter, whose LinkedIn profile appears to confirm his employment status.
The staffer told Insider that the photo was genuine, and was taken in a prominent location near the dining area, meaning everyone in Twitter's San Francisco office would see it.
Another framed tweet is from the official Twitter account on October 4 - around the time Musk agreed to go forward with purchasing the company.
Its simple greeting - "hello literally everyone" - gathered 3 million likes, and likely referred to a long Facebook outage at the time.
But the other framed post which reads "Twitter is watercooler" is over fifteen years old. Its author, Steve Garfield, questioned why his avatar had been replaced with the Twitter logo.
It's unclear how long the framed tweets have all been up.
Twitter and Coca-Cola did not immediately respond to requests for comment.