None of these are non-dynavap products, just older stuff no longer sold by them: Blackwood body with end caps, cocobolo body and stem, and carbon fiber. (As you can see, not everyone has a tip.) The only tips I have are second-to-latest generation ti, and 2018 M SS.
This is my only unusual stem. Made it myself from an old wood and horn spoon. Wrapped with a bit of hemp fiber because when drilling out, a slight split formed in the horn. Wrap is to prevent cuts, no air leaks there.
And this oddity, which I made to explore whether a shape that allowed spinning (flipping, actually) to originate in the wrist rather than the fingers had any benefit. I think I could be useful to some folks. But IH is a better solution to difficulty with spinning probably.