Well, our seating cards are shells that hold the placecards and after you can use as a picture frame, that's our favor. Then, we are going to put something personalized in the OOT bag also (koozie or mints? Not too sure yet) along with the other items. So I would say that they are kind of favors also.
http://www.myweddingfavors.com/shell...rd-holder.html