Some bottlers carried a line of seltzer, adding carbon dioxide to water to make it effervescent.
His collection has grown to include some straight-sided bottles and even some Hutchinson bottles.
He still goes to flea markets and yard sales, although the competition for valuable items has picked up dramatically in recent years.
"The thing about Coke collecting is that good pieces are always going to be good pieces," he says.
Several years ago, he came across a straight-sided bottle from the tiny town of Buena Vista, Ga., dating back to 1912 or 1913.
The bottle was one of several that had been dug up near Warm Springs, Ga., and until that time there had been no record of straight-sided bottles made in Buena Vista.
They were staples of small soda fountains from the turn of the century well into the 1920s.