The dripping red wax seal has become a staple of Maker's Mark bourbon. Now a federal judge says it's not just a tradition -- it's a trademark.

Today that judge issued an injunction preventing a rival liquor company from using the same seal on its bottles, according to the Associated Press. The decision ends a seven-year legal battle over the bottle topper.

U.S. District Judge John G. Heyburn's decision comes in a lawsuit between Maker's Mark and London-based Diageo North America and Casa Cuervo of Mexico over the company's trademark on the wax seal.

Cuervo used a dripping red was seal on a special bottle of its Reserva Tequila, which was distributed by Diageo.

The ruling barred the companies from using the trademark seal, but did not award damages to Maker's Mark.