No. 2 is the No. 1 reason not to go to Times Square’s insanely crowded ball-drop!

Revelers are being forced to layer on up to four Depends adult diapers— with peddlers selling pairs for $50 a pop — because once you get in the pen, you can’t leave for bathroom emergencies, sellers told The Post.

“It’s funny til it’s not,” said Orlando Mendez, 38, who was hawking the plastic panties on Sixth Avenue near West 44th Street. “Desperation sets the price.

Revelers are being forced to layer on up to four Depends adult diapers— with peddlers selling pairs for $50 a pop — because O, sellers told The Post on Wednesday. Robert Miller

“There are no bathrooms in there at all. Once [people] are in, they can’t come back out. This is a real problem,” he said.

Mendez of The Bronx had already “discreetly” sold two pairs of the diapers, for $50 each, to two women, one youngish and the other middle-aged, by noon on New Year’s Eve.

“Surprisingly, a lot of people are already wearing diapers,” he said. “The early birds and the die-hards know the game.”

One of the diaper hawkers said a female reveler revealed she already had on four of her own pairs of adult diapers.

Mendez said his potty-centric hustle was inspired by the cash he recently made slinging Christmas trees.

“I had been selling Christmas trees and I felt like this was the next holiday thing,” he said.

Thousands are expected to gather in Times Square in New York City to watch the annual ball drop at midnight. REUTERS

This year’s New Year’s Eve is expected to be the coldest Dec. 31 in New York since 2017. Robert Miller

“It’s the New York hustle.”

Kimberly Myers, 55, preschool teacher from Santa Monica, Calif.,  came prepared for the ball drop by wearing a diaper and bringing an extra one along with panty liners. 

She also stocked up on survival-gear-style supplies to brave the crowd and the cold — including trail mix, lidocaine for knee pain, thermal leggings, hand warmers, grapes, pumpkin seeds and Tums.

“I feel like I’m prepared but still a little nervous,” she said. “This morning it was like 25 degrees.”

“I’m so excited. I watched [the ball drop] as a little girl on TV every year and I just kept saying I gotta do it one day,” she said.