Check out http://www.bzzagent.com/
This is a great company! It's word of mouth marketing and they send out FREE samples. Sometimes these free samples are full size products such as a recent "Bzzcampaign" featuring full sized bottles of AVEENO NOURISH + Hair Care Shampoo and Conditioner.
It's free to sign up and the only obligation is that you agree to pass out samples and coupons to friends.
I've been a BzzAgent for 3 years now and I love it!