I have made a few different ones before, i have used wooden dowels as well as old sheds that i cut up. both have brought in deer. i put them in a sock, tie the top and put an elastic around it for when its in my pack.
i agree that it does not sound as good as real horns, but it works, and has its advantages, you can use them with out much movement in stand, easy to carry in and out,ect.