I have many cases of old thick reusable bottle to get rid of. Ever since I started kegging they are just in my way. There is a mixture of 12 and 16 oz. located in Wheaton, IL.
Maybe this:
http://www.peakauto.com/products/antifreeze-coolants/rv-marine/rv-marine-antifreeze/
It states that; All ingredients are considered GRAS (Generally Regarded as Safe) by the Food and Drug Administration
Do you need something like this?
http://www.suremarineservice.com/FIT-558.aspx?gclid=CMfvhqCKp7wCFckWMgod5kIAKQ
Ace has a great assortment of brass fittings and adapters.
Drink more!
I got a bunch of mine when I started from a local bar that serves mostly craft beers. I went in and told them what I was doing and if they could save some bottles for me. I told them I would bring a few of my home brews for their trouble. They were happy to do so.
Good luck