Advocates of legalizing marijuana aren't giving up the public relations fight.

Thursday at 10:30 a.m. they will hold a press conference in downtown Portland to remind beer and wine lovers of the relative harmlessness of pot over alcohol to consumers.

The billboard features a glass of beer, a glass of wine, and a marijuana leaf below the words "Beer," "Wine," and "Safer."

"Our goal is to make this year's beer and wine festivals as educational as they are enjoyable," said Roy Kaufmann, Oregon representative of the

. "We simply want attendees who are drinking to think about the fact that marijuana is objectively less harmful than the pint of beer or glass of wine they have in their hands."

"We know Oregonians are proud of our craft beer, wine and spirits, but the objective fact remains that marijuana is less toxic and less addictive than alcohol, and it is far less likely to contribute to violent and reckless behavior," Kaufmann said.

, which

Oregon voters rejected efforts to legalize marijuana last year.

The media availability is at Southwest 13th Avenue and Southwest Alder, where the billboard is posted.

--