It's elephant droppings.
Les and Paula Ansley, both scientists, got the idea to make their own special variety of gin after going on a safari a year ago.
A wildlife ranger explained to the couple, creators of Indlovu Gin, that elephants eat a variety of fruits and flowers and digest less than a third of it.
"As a consequence, in the elephant dung, you get the most amazing variety of these botanicals," Les Ansley told The Associated Press.
He recalled his wife suggesting they make their own gin from the botanicals. They described the gin's flavor as "lovely, wooded, almost spicy, earthy" and one that changes with the seasons and location.
The couple collect the elephant waste themselves with their bare hands, "so you're able to compare almost different vintages of the gin," Les Ansley said. They initially had it mailed to them in the first stages of the gin-making process.
Five large bags of the dung are collected to make 3,000 to 4,000 bottles of the gin. The droppings are then dried, crumbled and washed to remove and dirt and sand. The smells left are that of flowers, fruits and leaves eaten by the elephants, Ansley said.
Each bottle sells for around $32 and is marked with the date and coordinates of where the elephant poop was collected. The couple did not say how many they've sold.
"The initial reaction of most people is, 'What? There's no way.' But most people are very keen to actually taste it," Ansley said.
The gin is sold online and at duty-free shops and game lodges. The name Indlovu means elephant in the Zulu language. Tourists looking for a unique African experience have been more than willing to give it a taste.
"I even touched the elephant dung, and being close to the animals are very majestic," said Elsabe Hannekom, a visitor to the Botlierskop Private Game Reserve in Mossel Bay, South Africa who participated in a tasting session. "So having a piece of them actually feels quite good. An export of the African experience, I would say."
The Associated Press contributed to this report.