This anal plug is made out of pyrex glass. Yes, glass. No it will not break inside your body. Yes it is safe. No it does not hurt. Glass is firmer, completely non-porous, you can use it for temperature play and is safe to use with all kinds of lube.
I highly recommend trying out a glass toy. Just maybe not this one at first. This is not a beginner toy. This is quite the advanced anal toy. So wait a while, and work your way up until you want to invest in this one. This particular toy is very beautifully shaped for ease of insertion, it has a nice flared base as all anal toys should (so it doesn’t get lost).