i dont think it makes much difference i have a plastic one it hasn't faded or broke when bushes hit it. works well doesn't rust. plus if it does get caught it will be easy to break off than a metal one.
Yeah, you NEED a coffee pot fer the top, they dunt werk proper without. If you can't find a coffee pot, goldfish bowls or even a small lighthouse is a good second.
Frankly, I can't honestly remember what it was called. It's a phase of my life I'd rather forget all details of. Look it up on t'internet if you want one that much.