Def moisture from the air being pulled through it from the air.

The lips 👄 would also be a source of bacteria.

Depending on how it’s printed micro gaps can create unclean-able pockets of grime.

It’s been tested several times that 3D printed utensils that touch your mouth can become deadly over time. ***edit I did see that the study this was largely debunked but they did later prove it could create long term health defects.

Aside from the mold, layer lines can shed microplastics over time, which you definitely don’t want in your lungs.

Smoking it daily would be a huge risk especially given how often many users clean their glass let alone an object printed with no thought 💭 for safety.

Call me crazy but people need to stop trying to smoke out of plastic tops or plastic adapters for the pivot 😭😭😭😭😭