Hydrometer case

I brew mead and other things, but my passion is mead, and frankly I can be a bull in a China shop sometimes so I tend to knock things over. When you break a Hydrometer it's not something you can run down to the store for and pick up unless you have a good brew house near by. Protecting my delicate hydrometer has always been an adventure til I bought my 3d printer. It fits in the plastic cheapo hydrometer tank and may need to be edited in order to fit a glass beaker.
It has an air channel al