Review on 🥃 Surgical Grade Steel Whiskey Stones: Unrivaled Chilling Perfection for Your Spirits by Kyle Ross

They work but all 4 take some time to chill 2 chilled bottles of beer to a good temp in a large Yeti. I'd say it's about like leaving the beer in the freezer for 20 minutes after having about the same number of cubes in it, maybe less. So it's more convenient than a freezer and generally better than ice, but no wow factor. Maybe there is a wow effect.