Stopper Will not melt, I believe it's made to be sterilized that way.Yeah bro, I've been looking into this for a couple of weeks now—as time permits.
Just for homebrew and other hygiene/medical items I want to sterilize, I've been looking at small autoclaves and pressure cookers.
These cartridges are rather complex... as you have pointed out, the stopper is an issue because of the material and it's fitting into the glass. Will it melt/deform in under pressure? Will it lose it's fitted seal? I don't know. It would be easy if they're sterilized already to just order and start using. However, if it's going to be something I have to experiment with during autoclave/pressure-cooker, it's going to be something waiting on a long list.
I tell you the truth I have been using them how they come and I haven't had any issue but yeah hard to tell I guess ahahah
No redness, no painful injection after, nothinf