Sorry re-hashing old thread. Searched "impossible bottles" and found some threads.
Like others here, I find these kind of things not only art and magic related, but a great cognitive exercise. I have looked at almost every picture/post/book that discuss "impossible bottles". (Not literally but many hours nevertheless trying to figure it out)
*without much luck to date* have not had enough time to really sit down and try. It's on the "to-do"list
I enjoy the thought of thought, and have tried myself *briefly* using a empty packet of cigarettes. I respect Jamie's wishes not to engage in "divulging" the methods. It would be great for the occasional hint mind you which I am semi sure those that know the "how" do help in suggesting to others, pointers. (I may be mistaken here -it seemed to be the general vibe on a few forums, if you had put in your time reading/trying/thinking and were serious)
Harry Eng must have been an amazing person based on the things others have written about him, much like his home made detachable vice
which in itself is an engineering feat.
I do hope the art of producing such works is passed on to others
I look forward to the day, when I achieve even halve the looks some of these guy's can produce, I can not get how a lock can go into a bottle. I must be over thinking it!
edit: here's one I recently found.