I have this 16 fluid ounce glass bottle of 7 up with the metal cap that says Yorktown 1781. What value do this bottle has? Thanks

I don't have a direct answer to your question. This is a tough question to answer using online resources. But, you may want to check out the following sites and contact them for more information.

The Weide's Soda Page (http://www.ca-yd.com/html/bottles/soda_homepage.htm)

Bottles : Soda Pop : (http://search.rubylane.com/collectibles/,id=12.11.html)