Hello I just received a few bottles I'm trying to identify to get the value off. I'm having trouble with one in particular. Any help would be GREATLY appreciated! The thing that's really getting me is it is a glass bottle with a screw top.Details:10oz Coca Cola Bottle with "Coca-Cola Trade mark R 10 FL OZ" on one side and "Coke Trade Mark r 10 FL OZ" on the other. Dispose of Properly is along the top of the neck and on the bottom is "8M", "11", "21", "396", "6" with a mark underneath I can not identify. Attaching a photo isn't working right now but here are the links to the photos I tookhttps://goo.gl/photos/J9pSe1oUhDqT9VZr5https://goo.gl/photos/LrDs3pd4n6YwPU5XAhttps://goo.gl/photos/L73bYapnoRxnYrCJ8https://goo.gl/photos/U1JnnFhMP4cGyTZR8 Thank you