Earlier this week, Tide had an offer where you could input a UPC and a special code to snag a special NFL rally towel. Their site was hammered with traffic, and the offer got a little retooling. I just checked and it's back up. However, you will need to print out your confirmation and send them a receipt proving actual purchase of Tide.
If you snagged a towel earlier this week, I hope you get it! I haven't received any email notification telling me that I wouldn't be receiving this freebie, so I hope they honor the requests made while the original offer was up.
Here's a link to the Tide NFL Rally Towel offer.