Glass Carboy Storage Cap

thingiverse

This prints a simple cap for a standard glass carboy, used for when I need to put the carboy into storage, in between brews. It should fit different sized carboys as long as the external diameter of the bottle neck is approx. 54 mm. I made it so it fits quite snug, and will require a bit of a pull to pry off. Nevertheless it's probably not enough for it to be really airtight, although I suppose with an extra layer of silicone it might do the trick. DO NOT use this cap with anything brewing or fermeting inside the carboy: either this cap will come flying off or (unlikely but worse), your vessel will explode.