EDIT: Their site isn't working for many people, so I'm pulling this one.
I'm ignoring the other samples on this free Coral toothpaste site because I have no idea what they are. I hope the samples are all made out of 100% coral though!
Also note that you'll be subscribed to a newsletter when you request a sample, so make sure you use a spam email account! Actually you should be doing that for every freebie