This one is not exactly a free offer but it is a good one hence I am posting it here.
Gevalia is a reputed company. I have done business with them in the past. Now they are offering 3 boxes of coffee for $3 + a free stainless steel mug + free shipping, with no need to buy anything else.
So, give it a try.
Gevalia – 3 Boxes for $3 + Free Mug – EXPIRED