How does the Passe Passe Bottle & Glass magic trick work?

Question

I saw it done with a jar of peanut butter & jelly but couldn't figure out how and i looked online and i see it's available to buy the trick, but i just want to know how it's done.

Answer 1

Here's two versions

http://www.thetrickery.com/full/Magic-Tricks-Magic-Estate-Sale-Magic-Shops-1-Harries-Super-Deluxe-Passe-Bottles__7579.htm

http://www.hoylesonline.com/p233.htm