It is a made in China novelty item. I went to look at one locally that still had the made in China sticker on the bottom. It doesn't say Weber on it anywhere. If memory serves, I eventually ran across something online where you could buy them in bulk. From what I found, they appear to have nothing to do with Weber.
I seem to recall a post where someone maybe included it in a pic of something else & mentioned they had also picked that up somewhere.