I've got a little bag full of pyrex drip tips, including a few trippy tips. I've had one from the
ecig break on me, & another from there arrive broken on arrival.
The reason that I keep these in a bag is because i'm not using them. I refuse to have something that fragile & glass that close to my face & lips. I can only imagine how it would shatter if it was hot.
Just my 2 cents.