This is an easy to print cap for Arizer glass balloon mouth pieces. The ones I originally bought all broke and I bought some others from uncle bezos and they broke too. So I decided to make some out of the toughest stuff I can print, 95A TPU! These fit perfectly over the mouth piece and hold in your precious vapor.

ONLY PRINT IN TPU or another flexible material. Flip the model in your slicer so it prints with both rings touching the bed. I didn't need brims because this Voxelab TPU is a joy to print with. YMMV.

EDIT 2024/01/26: I made the band connecting the two circles longer.