I have one and I use it all the time. It's a fantastic gimmick that every magician should own (coin magician or not) Keep it in your pocket at all times and you can't go wrong. It's very simple to just slip this in the neck of a bottle without being noticed then perform the 'Coin in a Bottle' trick.
With a borowed 10 pence piece.
£15 is quite expensive for a folding coin and does seem a bit silly, but it does last a long time and you can get alot of laughs from it.
A reputation-setter that I'd give 9/10Rating: [5 of 5 Stars!]