1965 Mountain Dew Hillbilly Glass Soda Bottle. Misprint.

Do you still see bubbles in it when shaken slightly? Does the lid seem tight?

I ask the question as it is very unusual for something like this to happen. A bottling plant has the bottles go through at a significant speed so the 'toy' would have to be introduced in a very few ways. 1) in a recycled bottle that did not get cleaned properly AND passed inspection, then missed again at least twice at the bottling plant. 2) in the empty bottle arrivals (deliberately) by either a tour visitor or employee and again missed at a couple of inspection points. or 3) it's something I did as a kid: bottles of this era had very thick caps. It was a simple matter to gently pop the cap (without deforming it) insert something, and then pressure fit the cap back on. (Ok I was a weird kid - get over it! (grin))

The problem was that you released most of the carbonation that way so it rapidly lost it's fizz. Which is why I asked the questions I did.

What I notice is that the bottle isn't filled 'almost to the top' as was standard back then. There is way too much air space. That leads me to suspect that I wasn't the only wierd kid back then.

It's an interesting vintage bottle, but I don't think it's overly valuable. Sorry.

these can be recapped. the bottle is worth 8-10$ with out the toy. being full you can get like 2-3$ more and maybe a few extra dollars for the toY. any one with a cap and a capper can do this to a regular mt dew bottle . alsoit was common for stuff to be  done after hours for fun in the bottles and taken home.  in have seen a ton of screws and nails etc in the bottle and people trying to sell tham as rare.