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.

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.

Donald Trump's beloved soda button is back and ready for four more years of thirst quenching with just a push.

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.

The return of the Diet Coke button and Trumps well-documented culinary preferences highlight his emphasis on personal comfort and routines during his time in office.

Donald Trump has reinstalled a button in the Oval Office which allows him to get Diet Coke on demand. During his first term, President Trump had arranged for the wood-encased, brick-sized button to be built into the Resolute desk in the White House.