I wouldn't be insulted if I didn't get a favor. They are mostly tossed or left on the table.
This does bring back one nice memory. One favor that I really did enjoy was small tree saplings wrapped in plastic. We planted ours (a pine)...it thrived each year and I always thought of the couple when I walked through the garden. We sold the house so I'm not sure what it's like now...would like to see it again.