Okay, so I just transitioned from an ice cube maker back to ice cube trays, and I was looking for a BIFL option that wasn't plastic (or silicone)
I ended up buying both those metal cubes designed for whiskey, as well as a metal ice cube tray that has this lever that breaks apart the ice cubes after they have become solid.
My conclusion is that the metal tray with the lever is by far one of the best ice cube trays that you can get.
It will last forever, zero weird taste, easy to use, not terribly expensive, and definitely something that I would recommend.
All other options are either gonna make the cubes taste bad, introduce plastic into your cubes, may not last as long as you'd like, or just suck at being functional.
The one I got is from the brand Onyx, and looks like this:
