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 CottonTom Bryant CottonThe Hill's 12:30 Report - Presented by Facebook - All US adults now eligible for COVID vaccines Parade of 2024 GOP hopefuls court House conservatives Hillicon Valley: Biden administration sanctions Russia for SolarWinds hack, election interference 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.

ADVERTISEMENT

An aide to Sen. Ted CruzRafael (Ted) Edward Cruz15 Senate Republicans pledge to oppose lifting earmark ban 'Real Housewives of the GOP' — Wannabe reality show narcissists commandeer the party Is the antidote to bad speech more speech or more regulation? 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.

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.

ADVERTISEMENT

“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 CassidyBill CassidyBottom line Calls grow for national paid family leave amid pandemic Senators urge Energy chief to prioritize cybersecurity amid growing threats 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 JohnsonRonald (Ron) Harold Johnson15 Senate Republicans pledge to oppose lifting earmark ban 'Real Housewives of the GOP' — Wannabe reality show narcissists commandeer the party Republicans fret over divisive candidates 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.