how about one of these: http://www.pure2o.co.uk/shop/index.php?cPath=35_60
I went to have a look at that website. If you want to shop there you have to agree to them passing on your details to "carefully selected" third parties. I'm not usually bothered about a company keeping my details for themselves but the absence of any opt-out tickboxes for third parties means that I would not shop there.
It's not just Pure2O either. I always do this if not given a choice in the matter.
If it sounds like I'm being picky, I once signed up for some software a few years ago. The email address I gave was unique for that transaction. Eventually the spam started rolling in. They had "carefully selected" third parties too. Bear in mind that once a third party has those details, the original recipient has no control over what happens to them.