Starbucks has been accused in legal action of overfilling its cold drinks with ice instead of using the advertised amount of coffee or other liquid.
The lawsuit was filed last week in Chicago on behalf of Stacy Pincus, a local woman who accuses the coffee giant of misleading consumers.
The action alleges that an iced beverage advertised at 24 ounces contains about 14 ounces of fluid.
Starbucks spokeswoman Jaime Riley said on Monday that the company considers the lawsuit to be without merit.
She said customers understand that ice is part of an iced beverage, noting that Starbucks remakes beverages if customers are not satisfied.
The lawsuit seeks class-action status, which could allow it to cover customers for the last decade.
Among other things, the claimant is seeking damages, restitution and legal fees.