Hurry on over to the Silk website to request your coupon valid for a FREE cup of Silk Yogurt! It will take you just a few seconds to complete. You will need to connect your Facebook account in order to get the offer (but you can then go into your account and disconnect access afterwards). They are not getting private information, just the ability to post on your behalf if you choose to share it with your friends.
These types of free coupon offers never seem to last for very long, so get in on this offer while you can!