I have been performing this trick for sometime now and it always gets fantastic reactions! I only do
magic as a hobby so when I produce this effect I get incredible reactions from my spectators.
Being from London I take my imagination and step it up a notch and use coins (obviously for
bigger bottles ect) and instead of using a PK ring I use another (magnetic method without giving too
much away) so you can use a PK ring but another way can easily be achieved just as good if not
better.