NG,
I can't speak to the value of the bottles, but they do have an interesting history.
http://www.answers.com/topic/virginia-dare-extract-company-incAlso, I did some research on your "very early Chevrolet". I think it is a 1913 model. I collect antique Chevrolets but mine aren't THAT old. I have a '48 and a '52.
Here is a neat youtube video showing how the car would have looked on the road. The one in the video is a roadster. Based on the number of top bows you found, I believe yours was the larger touring car model.
http://www.youtube.com/v/6BiNyX6xVqUDCMatt