The crazy amounts people will pay for these bottles
RAY Klein does not have a problem with paying thousands of dollars for codd-necked bottles.
"When you're a collector you can never have enough," he said.
The Roma collector, who has 160 different types of the bottles at home, was one of hundreds who flocked to the Toowoomba Antique and Collectors Fair and Exhibition on the weekend.
Mr Klein has had a fascination with the oddly-shaped bottles for decades, which were invented in the 1870s as a way of sealing soft drinks using a marble and a rubber seal.
It's a rather ingenious affair, it was patented by a man called Hiram Codd in the 1870s," he said.
"He made this internal closure of a marble in here and why it just sits there is that if it pools to the bottom, it will fracture the marble or bottle.
"When you turn it on its side, the marble collects in one of these pockets and when you want to re-seal it, you just turn it over and the pressure of the gas re-seals it."
Thanks to children cracking the bottles open to retrieve the marble, the original bottles are rare to find.
However, Mr Klein doesn't just choose any type, saying he only collects bottles from north of the border.
"I have 160 at the moment and I collect only Queensland-branded ones, so while these are very nice they're not what I'm looking for," he said.
"It's a bit of a hassle finding one you haven't got when you've got so many Queensland ones.
"They're pretty rare and unfortunately I have to part with a fair amount of cash to get another one."
The exhibition, organised by Darling Downs Bottle and Collectibles Club, had more than $5 million worth of items on display over the two days at the Toowoomba Showgrounds.
President Peter Hole praised the stallholders and sponsors for their support of the event, which has run since 1979.