Free sample of Arm & Hammer toothpaste
You can opt in or out of its mailing list, and decline or accept its offer to provide feedback about the sample. After you submit the form, you should receive an e-mail from Arm & Hammer confirming your email address. You must open and click on the link in this email to complete the free sample sign up process. I got my confirmation e-mail almost immediately.
Caveats: one per household. Expect the sample to take 6-8 weeks to arrive.
Thanks, Money Saving Mom!