Rather obviously this is only going to be for EDF customers. I've had a quick look and in a couple of seconds I saw a Zingy keyring for £5.25 on ebay so whatever you might get would be 100% profit if you did for some reason want to give your little Zingy away.
Just log into your account and change the preferences, and then go slowly and notice the little peel away animation in the top right hand corner of the site - click on that and it will take you to the offer. You will either get a big furry Zingy, some stickers, or a keyring. It's pot luck, but surely worth just a simple little change to save more paper and also get yourself some free stuff. This is a first come, first served basis.