But the Dietitians Association of Australia (DAA) was quick to dispute the fizzy drink giant's reasoning, saying that water was still the ideal drink.
"It is unhealthy, [Coca-Cola] has no basis in saying that. It's out of context of a healthy diet," DAA accredited practicing dietitian Arlene Normand said.
"They're basically just trying to promote Coke. I can understand that reasoning, that it's better to have one coke [a week] than a coke every day, but the more you have, the more you crave. Ideally, people should be drinking water."
The stoush ignited after leading researcher Professor Marion Nestle, from New York University, criticized soft drink companies, saying they were distorting the truth about their products in order to keep profits growing.
"There is so much evidence now that drinking sugars in the form of liquids is not good for health," she said during a lecture at a Sydney University.
Professor Nestle also claimed the soft drink industry did everything it possibly could to discourage any warnings about consuming its products.
She went on to explain that fizzy drink manufacturers fund scientific research to push back against claims their sugary soft drinks contribute to excessive weight gain.
Part of the problem, said Professor Nestle, was that many countries did not conduct any of their own objective research into the potentially harmful effects of fizzy drink, and its role in the obesity epidemic.