I did a wedding a few weeks ago and my clients had bird seed favors for their sendoff. I got a few that were leftover and the birds in my yard have been very happy when I put them out. They came wrapped in cute little bags with the couples names on the tags. I see from their website that they have many different shapes and also that they are based in Texas as well. You can visit their website, NatureFavors.com and order them via mail if you wish for your big day.
Here is what they look like.