We are usually only allowed to request P&G sample packs every three months, but for some reason, this one seems to be open to everyone! Click here and scroll down to around the middle of the page where you should see a blue “Get The Coupon” button. Click on that button and you will be redirected to a page that lets you request all kinds of coupons in addition to a free sample of Crest 3D Whitestrips and Toothpaste!
(Thanks Clipping With Carrie!)