Bottle fermenting airlock

thingiverse

Airlock design for in-bottle fermentation, originally created for fermenting cider in glass bottles, now adaptable to any bottle with a mouth diameter between 24 and 30mm. Potential applications with scaled models for other bottle sizes are possible. To utilize this airlock, simply fill it with water from the top, then insert it tightly into the neck of the bottle. A tighter seal can be achieved by applying some silicone tape, rubber band, or Teflon tape; however, issues have not been encountered using the print as is.