I ordered this tooth whitening product as a "free sample" with $2.98 in shipping charges. when it was charged it came in at $11.98; since it was being shipped from the USA to Canada I assumed that was the international charge and did not complain. I received this product and then 2 weeks later unusual charges started to come up on my credit card account, which I disputed. I was informed that by getting this free sample I authorized the company to send my account to any number of other "associated firms" to start charging my account for I don not know what. I am presently trying to stop this. It turns out somewhere in the fine print they state that they are authorized to do this. I submit this as a warning BEWARE!