coca-cola medlas

all I know is that they are some type of centennial coins or medals of some sort. I do know that coca-cola became a company in 1886 and there centennial celebration would have been during 1986. I am not sure what type of metal, I am thinking its bronze. My guess would be that they gave them to the workers that year. But only 2500 of the coins/medals were made. I'm not sure how much they are worth or if anything and that is what I am trying to find out.