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Comment by DarkShikari | Hacker News Reader

http://www.wikihow.com/Make-an-Impossible-Bottle

word. so after rebuilding the card box and inserting the cards one by one, the plastic cover is reattached. pretty neat.

"Rubik's Cube 1. Disassemble Rubik's Cube into all 27 parts. 2. Reassemble inside bottle."

Brilliant :-)

How would you do a golf ball though?

Or the padlock.

I suspect if the lower brass piece were removed from the upper loop both pieces fit in. Then just reattach them. I'd do that with clever placement of tiny magnets.

Sure, it doesn't work as a lock anymore, but who can tell?

Actually, now that I think about it.. it does work as a lock. I mean, how often to people pull on a lock to see if it is really a lock? Plus, you can't forget your key.

I've dismantled a padlock before, different type, but it still worked. The one I dismantled I had to use a heat gun to expand the casing and a heat sink to keep the interior cool.

You can actually assemble things inside a bottle using callipers and dividers, they generally have much better length on them than a pair of tweezers and are much easier to pick up than an adequate pair of forceps. I wouldn't doubt some of the narrow necked items could be assembled using forceps.

According to the rules on the website "Items inside must be usable", so I'm guessing the lock still works as intended.

Easy, the padlock used is a master lock type. By removing the bar from the lock (which easily fits through the neck in any direction) you can insert the mechanism half of the lock sideways (where it is narrow enough to fit through) and then you reassemble the lock inside.

It's certainly not easy to do, but it is do able.

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