Jefferson City. Mo. ? A St. Louis weight-loss instructor is suing The Coca-Cola Co. over its product loyalty campaign, claiming the program might encourage kids to drink so much of the sugary soft drink that they could die.

The campaign, called “My Coke Rewards” gives customers points for buying Coca-Cola products. Customers trade in points for prizes that range from baseball gloves to free vacations.

Coca-Cola spokesman Scott Williamson said Havey is “horribly misinformed” about the rewards program, and the lawsuit is simply an attempt to drum up attention for the weight-loss books she writes.

Julia Havey says it’s no sweet deal. The program expires in January, and to accumulate enough points by that time for high-end prizes, customers would need to drink hundreds of Cokes a day, she said.