Do Copper Bangles Work?

Hi folks, Anybody know anything about whether Copper Bangles
work to cure Rheumatism and Arthritis? Nobody I have asked
knows for sure how they are supposed to work but I have
found a place on the net (www.copper-bangles.co.uk) which
claim that their bangles redirect body electricity and cure
chronic rheumatic and arthritic problems in all ages. I want
to buy one as a present for my Grandma who suffers from
chronic arthritis in her hands bless her. I don't normally
believe in all this new age stuff but I saw Ian Botham the
former England Cricketer, wearing one in a TV advert
sponsoring a breakfast cereal recently and thought, well, if
it's good enough for him, he must be getting results so it
might be worth a try, but there are just so many offered on
the net. This firm seems about the cheapest and gives lots
of information. Are all copper bangles the same do you think
and how do they work if at all? Does anybody in this
newsgroup use them? Thanks for your help, Tracy