Four things I can see with it is; first that it would have virtually no airflow other than the lid end, resulting in bacterial growth. It would be very easily cleaned though. Second is that you can see the snake which means he can see you within the hide, balls like to hide to feel secure. Third would be that the glass probably won't feel very comfortable slithering across to the snake. The Fourth ......Well the mason jar is making me darn thirsty. For humid hides I use extra worn out USMC covers that I still have from when I was in the service stuffed with moss. Grant it that they require frequent cleaning. I imagine you can use ball caps and flatten out the bill a bit to make a small opening.