The "mules" were compensated with cocktails.
The overproof rum, called SX9, was available in specialty bars and not stocked in liquor stores.
"Traditionally, it's not aged so it hangs on to its characteristics," Duff said. "It's 65 per cent alcohol so you don't want it falling into the wrong hands."
Twenty-five frequent travellers had signed up so far, including Jade Hurst, 30, who travels to Sydney four or five times a year.
She responded to an ambiguous "mules wanted" poster plastered on a Ponsonby electricity pole as she liked the idea of helping a local company and thought it was quite clever.
Her first rum run, to Darlinghurst night-spot Eau De Vie, was planned for May.
Stolen had given her a T-shirt emblazoned with the word Mule to wear through the airport. "I might have a jacket over it so I don't draw too much attention," she said.