that's a very nice bottle, pappys right on the value if i remember. (when i say "if i remember", i meen i'm taking a guess BUT an educated one

)
That bottle would have come with a dose cup on the top, try digging around for it. It should be a little blue cup just big enough to fit over the bottles top. You might have found a privy or a small dump, kep digging.
And pure red glass was made with gold, theres actually an ox-blood red colored insulator with a piece of something that looks likegold in it! Not sure if it is though...