Brewing air lock

Made this for my son who wanted to to try making wine for his highschool chemestry course. Works well and is intended to be inserted into a rubber cork, and then into the bottle/container of choice. I used ABS to print, and although it is not “food safe”, there should be no contact with the material that is brewing so it should be OK. Use your best judgement as to what you want to use.

Design by tdpl769 on MakerWorld (license: CC0).