4.5" diameter food-grade plastic funnel fits beer bottles or flasks.
It does funnel things like it's supposed to. Doesn't appear to be scratched anywhere or any deformities that might allow the "bad guys" to hang out.
I use this funnel when making yeast starters in a glass growler. It remains stable in the mouth of the growler while I pour the starter wort in, and doesn't gurgle or splash. It's easy to clean and sanitize. So far, it's been working perfectly and I'm happy I bought it.
It's very funnel-like.