Pabst Brewing Company and MillerCoors are heading to trial to settle a contract dispute in which Pabst accuses the brewing giant of trying to undermine its competitor by breaking a contract to make their products.

Pabst's lawyers argue the company's very existence relies on its business relationship with Chicago-based MillerCoors, which has made and shipped nearly all of Pabst's beers since 1999.

MillerCoors argues it's not obligated to continue brewing for Pabst and that Pabst doesn't want to pay enough to justify it.

The trial in Milwaukee County Circuit Court begins Monday and is scheduled through Nov. 30.

Pabst's attorneys say MillerCoors is lying about its brewing capacity to hinder Pabst's ability to compete. MillerCoors says it's simply deciding what makes economic sense for the company's future.