In the 2019 book, Team of Vipers, written by former White House aide Chris Sims, the use of the button was explained in more detail. Chris described how Donald Trump would suddenly press the Diet Coke button, leaving his guests in a slight state of panic before a butler would enter with the drink on a silver platter.

President Trump reinstalls the famous Diet Coke button on the Oval Office desk, along with other personalized changes marking his return to the White House.

The Wall Street Journal reported the valet button, which the president used to order Diet Cokes during his first term, already had been reinstalled Monday even before he was sworn into office. Another story said he was reported to drink around a dozen Diet Cokes a day in 2018, though it is unknown if he maintains that habit.

President Donald Trump has restored his famed Diet Coke button to the Oval Office to easily order his favorite drink at his heart’s content. The red button inside a wooden box was already on the Resolute Desk by mid-afternoon on Inauguration Day waiting for Trump, reported The Wall Street Journal.

Fox News senior White House correspondent Peter Doocy asks President Trump about famous 'Diet Coke' button.

The inauguration of Donald Trump's presidency concluded on Monday, marking the Republican's return to the White House after a gap of four years. With Trump, the iconic Diet Coke button also made a comeback to the Oval office.

The Diet Coke button returns! It was not only President Donald Trump who returned to the Oval Office at the White House, but the famous button found on his desk during his term is back as well. The button gained fame after it was revealed by Trump himself in 2017 that he uses it to summon sodas during his term.