Some Twitter users pointed out it could be an accidental case of "honesty in advertising".
"Obesity is the #1 cause of death in NZ, and Coke are just jumping on the marketing opportunity," someone said. Another Twitter user called it "fair warning".
"The Coca Cola company gains self awareness?" someone else wondered.
The Waikato Reo tweet received nearly 1000 likes in just one day.
This is not the first time a company's marketing message has been lost in translation. A popular example is the Mitsubishi Pajero car not really selling much in Peru. In Spanish, and in particular in slang language in South America, Pajero can be used to refer to he/she "who masturbates often".
Another car related marketing faux-pas involved the Chevrolet Nova trying to enter the market in Mexico, where "no va" literally means "doesn't go".
Coca-Cola has been approached for comment but has not responded.