What to Use to Replace Tiki Torch Top?

Those little brown wooden cups tied to the tall tiki torches, used to douse the flame, keep blowing off and getting lost during the summer. Besides taking extra steps to prevent this, right now I just want to make some extra "cups" to replace them. What can I use? It can't be glass (too heavy when it's dangling) or lightweight plastic, which will melt when put over the flame. Would like a sturdy round "cup" like what was there originally. Any ideas? Thank you.