I have this product, pyroclay. These caps are the thin, but hard, plastic looking ones that you see on most other non-oil supplements. After all this is non-clumping clay (powdery).
I'm not worried about the soft gel caps either. These soft gel caps and the number of them I take is hardly worth the bother to worry about the fluoride. A kilo of Geletin has a lot of fluoride; but one capsule is insignificant. You won't catch me eating even a spoon full of geletin. I worry more about how much I get when I shower or when I have a cup of green tea.