It's TV's Antiques Roadshow's most valuable find ever!
"A conservative estimate would be between a million and a million five hundred thousand dollars," the host said.
"Are you serious? Whoa!" said Doug.
It turned a physician's assistant from Tulsa, Oklahoma, into an instant millionaire!
"Not in my wildest dreams did I think that this would be happening to me!" he says.
Doug only wants to use his first name, for security reasons, now that he knows how much his treasured cups are worth.
He says he fell in love with Asian art when he served as a combat medic in Vietnam. He paid about $2,000 for them back in the 1970s.
The cups, which are made from the horn of a rhinoceros, date back to the late 17th century and would have been used by Chinese royalty.
Doug had them in a display cabinet in his house for decades. His daughter actually used to play with them.
Doug's daughter Casey said, "All of this is just unreal!"
He says his reaction on the show was kind of low-key because he was in a state of shock.
"I just said, 'Wow,' and I was pretty much speechless," Doug says.
There is one downside. Doug says he's upset he can't keep his beloved cups in his house anymore. He has to store them in a bank vault now. He says he plans to sell the cups and use the money to help out the people he loves.
"It is unbelievable. Something I'll remember the rest of my life!" he says.