Seriously, though, solid glass does make sense for reasons you and @marilove mentioned. And looking at the design it does seem like most of the, er, business end is, or at least could be, solid glass, and the glass where the ashes are encased could be pretty thick. In my ignorance I was thinking of something more like a test tube. I know how fragile those can be. It was a million-to-one shot, doc.
BTW, if you do go steel or glass, don’t go too cheap. Get a good quality one and it’ll last forever. When I moved across country, I tossed all my wobbly toys but my glass and steel ones came with me.
Oh wow, yeah, if the first thing to come to mind was thin breakable glass like a test tube … no, no, avoid those completely! I am still somewhat careful with my glass toys, but they’re not really that fragile.
Uh, as a mostly straight dude, I’ve not had anything up my butt (mostly because I’m a wuss, to be honest), but that is so gorgeous I kinda really want to get one and test it out, and hey, if it’s not my thing, then at least I have a nice piece of coffee table art.