Multiple senators have taken to drinking milk on the Senate floor this week during the chamber's impeachment trial.

“It’s true, I had some milk with my chocolate,” Sen. Tom Cotton Tom Bryant CottonRenewed focus on Trump's Supreme Court list after Ginsburg's death Republicans call for DOJ to prosecute Netflix executives for releasing 'Cuties' Loeffler calls for hearing in wake of Netflix's 'Cuties' MORE (R-Ark.) tweeted Wednesday evening.

“I guess I could’ve added vodka & had a White Russian (minus the Kahlua). But @RepAdamSchiff probably would’ve accused me of collusion,” he quipped.

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It’s true, I had some milk with my chocolate.



I guess I could’ve added vodka & had a White Russian (minus the Kahlua). But @RepAdamSchiff probably would’ve accused me of collusion. https://t.co/JY4ca2oMUe — Tom Cotton (@TomCottonAR) January 22, 2020

An aide to Sen. Ted Cruz Rafael (Ted) Edward CruzSenate Republicans face tough decision on replacing Ginsburg Cruz: Trump should nominate a Supreme Court justice next week Renewed focus on Trump's Supreme Court list after Ginsburg's death MORE confirmed that the Texas Republican also had a glass of milk late into proceedings Tuesday night, when senators were in the chamber until nearly 2 a.m. voting on the rules for the trial.

The aide, deputy chief of staff Sam Cooper, said the Senate cloakroom will keep the beverage cold for senators.

Cruz enjoyed a cool glass at midnight last night. Fun fact: the Senators have to provide their own milk to the Cloakroom (they keep it cold for you tho). #themoreyouknow https://t.co/5QfZaO81jh — Sam Cooper (@SamCooper33) January 22, 2020

During the trial, senators are required to sit quietly at their desks, refrain from talking and not use electronic devices while the impeachment articles are debated.

Senators spend most of the time in their seats but are allowed to get up to go to the restroom and the cloakroom, where snacks are stored for the members.

The Cut reported that staff in the Republican and Democratic cloakrooms have in recent years allowed only water on the Senate floor.

But a former Senate parliamentarian noted to CNN that a quasi-rule started years ago allowed senators suffering from ulcers to drink milk in addition to water.

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“It was thought to be a treatment for peptic ulcer disease in the '50s, and there was no medicines for peptic ulcer disease, but people would drink milk. And so the senators were allowed to drink milk because they had ulcers,” Sen. Bill Cassidy William (Bill) Morgan CassidyCoushatta tribe begins long road to recovery after Hurricane Laura Senators offer disaster tax relief bill Bottom line MORE (R-La.) told NBC News.

Multiple senators have used the renewed attention to chamber process for the impeachment trial to make light of any potential rules surrounding beverages.

"There's only two drinks allowed on the Senate floor: milk and water. That must come from a Wisconsin senator, right?" Sen. Ron Johnson Ronald (Ron) Harold JohnsonThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill Second GOP senator to quarantine after exposure to coronavirus GOP-led panel to hear from former official who said Burisma was not a factor in US policy MORE (R-Wis.) joked.

The Wall Street Journal reported that there is no official rule that stops senators from drinking beverages other than milk on the Senate floor, with the Senate historian noting "anecdotal evidence" of lawmakers drinking other beverages in years past, such as eggnog and orange juice.