Obviously a false post. I tried repeatedly to shatter glass Coca Cola bottles over my room mate's head in college. The bottles just WON'T break!
You have to fill the bottles first, but it is still difficult. I remember something from science class about this. Something to do with the empty bottle and density I believe. I did not really pay attention that well.
Funny, but every coke bottle I saw during my stay over there was PLASTIC.....
Did you ever stop to think if they would even send GLASS bottles over seas?
I am sure they use plastic!!!!