38-400 cap for storage and airlock
thingiverse
*Update 07 May 21* Tweaked liners again to a thickness of .6 mm. Tweaked caps: different ridges and slightly thicker outer wall. *Update 05-May-21* Renamed files. Tweaked liners to be .5 mm shorter in diameter for a better fit. 38-400 caps for home brewing. Have you every grabbed some cider and kept the jug to ferment in? Well, so have I and now when I run out of bungs, I can use these caps to either seal or ferment in...when I lose the metal cap :) Designed to have room for a lid seal - TPU .stl included for a plain cap and for one with a .25 inch hole which is perfect for a grommet. I verified that the cap with TPU seal does seem to be air-tight and allows airlock to bubble with my current set up, but will continue to test. Will also accept bone-fide 38 mm lid seals
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