Tall thin clear bottle found on beach with oddity inside

beachbottle

Found this thin, clear glass bottle on the each at Sandy Hook in NJ. Measures just about 12 inches tall and the mouth is about 1 inch wide. No markings on it at all, I normally find bottles on the beach and you can see the markings worn away but this doesn't show any signs of this. The bottle does have seems that show it was in 2 pieces the entire length till the neck of the bottle. I've found some odd bottles over the years but this I can't figure out what it is. About 5 inches from the bottom of the glass there is a thin piece of glass that connects to both sides of the bottle (one picture show this by looking into the bottle). This thin piece looks very fragile but yet it's still in tact after being on the beach for who knows how long. I'm interested in the bottle but more of why this glass exist inside the bottle. Why is it there? Is this a mistake or a defect?

Chris

One does see threads of glass inside bottles - some collectors call them "bird swings" - they are not common but I can think of a dozen or two that I have seen in recent years. It is simply a defect. One sees defects even on modern glass, have seen several recently in canning jars.

You bottle (based on its shape) likely held olive oil.

See this catalog page
https://www.google.com/search?q=antique+olive+oil+bottle&client=firefox-b-1-ab&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjT9deB2KLdAhULeKwKHcpBCgkQ_AUICigB&biw=1462&bih=806#imgrc=UOgtjHEZ1JXZ6M: