A lawsuit filed in California accuses Maker's Mark of false advertising by promoting its Kentucky bourbon as handmade.
The suit claims the process of making the popular bourbon includes mechanized or automated steps requiring little or no human involvement.
The potential class-action suit filed recently in San Diego claims damages exceed $5 million.
Maker's Mark bourbon is produced at a distillery outside Loretto, Kentucky. The brand is known for its bottles sealed in red wax.
Clarkson Hine, a spokesman for Beam Suntory, parent company of Maker's Mark, said Tuesday the claims are meritless and predicted Maker's will prevail in court.
The suit says the Maker's Mark label promotes the whiskey as "handmade." It says the automated process includes grinding grains.
The story was first reported in Kentucky by the Lexington Herald-Leader.