The Federal Trade Commission sued PepsiCo on Friday, alleging that it has engaged in illegal price discrimination by giving unfair price advantages to one large retailer at the expense of other vendors and consumers.

The lawsuit is the second Robinson-Patman Act case filed by the FTC during the Biden administration. In December, the FTC sued alcohol distributor Southern Glazer’s Wine and Spirits LLC for charging mom-and-pop grocers higher prices than large retail chains.

The agency claims the soda giant gave “unfair” pricing advantages to a larger retailer, forcing consumers to pay more at competing stores. Pepsi “strongly disputes” the allegations.