Is this a poison?

[ncbred]

This is a craigslist pic so forgive me. But the cornflower blue ribbed bottle on the right, junk or poison? Also wondering about the little round onion shaped bottle.

 

[PrivyProwler]

I'm not to sure on the onion shaped bottle. The cornflower blue ribbed bottle on the right although not real sought after and not worth alot is a poison bottle.

 

[GuntherHess]

I always wonder about people who put corks in screw top bottles.