This fly trap is amazing.  Normally, I have flies who buzz around my back door, waiting for a chance to break in.  Not now. They are 100 feet away transfixed on the Victor Fly Trap stink.  (For the record, it does smell slightly rotten, but I don't find it too repulsive or strong.) The hook on top of the container is metal; I just hung it off a wire fence.  I am attaching a photo after about a week. I'm tempted to buy more as the trap has been so productive.