"That came up at the dinner? The Thanksgiving dinner?" Bethenny Frankel, a guest judge on the show, asks.
Actually, yes, Karam explains, and the idea for Pristine was born. Oley explains they would use the $50,000 to buy an automatic, no-touch sprayer for diaper changes and sell it under their Pristine brand.
Though the Sharks are amused by the story, Pristine's sales weren't impressive: they'd only done $11,000 in sales from Amazon. There are also around 10 other adult toilet paper sprays sold on Amazon, they admit.
Robert Herjavec is out, citing too many marketing challenges. Mark Cuban is invested in a company called Dude Wipes, so he declares that he's out due to overlap. Frankel is also out, as is Daymond John.
But Lori Greiner is interested.
"Everybody laughed when I invested in Squatty Potty," Greiner says of the toilet stool that positions you to squat when go, which got its big break on "Shark Tank" in 2014. "And look what happened; we literally surpassed $100 million in retail sales. So, I'm sitting here trying to think to myself, would you fit within their arena?"
(By the end of 2017, Squatty Potty reached nearly $33 million in sales, its creator, Judy Edwards told CNBC Make It in 2018. "We're going to probably hit $100 million within the next few years.")
But Greiner doesn't know whether Squatty Potty is already working on a product similar to Pristine Sprays. (Sprays that deal with odor are the only ones currently available on its website.) Still, she wants to give the cousins a deal, but with a contingency: She offers them $50,000 at 25 percent, contingent on a partnership with Squatty Potty.
The founders accept Greiner's deal.
Though as of Monday a deal has not been finalized, Karam tells CNBC Make It, since the episode aired, the interest in Pristine Sprays has been "overwhelming," he says. And website sales increased by over 5,600 percent and Amazon sold out of Pristine before midnight on Sunday, according to Karam.
"Our experience on 'Shark Tank' was surreal," Karam tells CNBC Make It. "We had no idea how the Sharks would respond to our new butt-wiping innovation. Fortunately, we had a humorous and exciting time in the Tank, full of poop puns, and we are thankful that the Sharks seemed receptive to the idea. We couldn't be more grateful for the experience, and we hope that the viewers enjoyed it. Pristine is a funny product, and it is incredibly helpful for the environment too!"
This invention keeps bottled beer cold, did $1M in sales in 10 days and scored a million-dollar deal on 'Shark Tank'
Like this story? Subscribe to CNBC Make It on YouTube!
Disclosure: CNBC owns the exclusive off-network cable rights to "Shark Tank."