One Piece Deafening Horn for Duster Can

thingiverse

Had few almost empty Spray Duster cans kicking around. They have a valve button on top and a small air tube pointing sideways. So I've deleted the triangle hole from the model and added a surface for nice contact with a can. You have to drill a hole matching your Spray Duster air tube and cut the air tube very short. After assembly just put some rubber rings (made from the same balloon) over the can and horn or use some kind of tape.