I don't carry my vape around, but I still wanted a case to keep it safe when on my desk. The screen and buttons can be used normally and the device can be plugged in and loading. It's a good idea to use PETG or other heat resistant materials, though PLA seems to do alright as long as it's not being used for too long at a time.
I found that with some filaments the print comes out just a little bit too big, but not drastically.
Added an alternative version with a flat bottom for easier printing.
Requires cap: either from the original model or the additional cap I've made for use without a mouthpiece.
The author remixed this model.
Added openings for screen and charging cable