I carry a 15OZ PVC flute (in d minor) for my own entertainment. The first few days out I don't get it out, but when I get my trail legs, It's great fun. And many at the shelters have commented on how nice it was to listen to.
Sadly, it is no longer made as the guy what builds them has gotten very ill.
I also have one made by a friend in A, so may have a source if any are interested. It only weighs 13 Oz.