38 mm Store Bought Kombucha Bottle Cap Replacements – 8 Pack

This 8-pack of black 38 mm reusable bottle lids comes with built-in airtight polyseal gaskets, designed for both secure storage and to hold pressure during and after secondary fermentation. They’re commonly used for secondary fermentation in kombucha, water kefir, cider, beer, mead, seltzer, and other carbonated beverages by keeping carbonation sealed in, helping your batch stay fizzy and fresh.

These lids are sized to fit Fermentaholics stout bottles and all standard 38 mm opening bottles which includes most store-bought kombucha bottles. While there’s no single universal “kombucha bottle,” various commercial kombucha does come in bottles with 38 mm openings, this is the also the most common size used for growlers and carboys.

Their versatile uses include bottling beverages like beer, wine, vinegar, oils, and more. They’re also well-suited for storing water, tea, juice, soda, and for fermentations that require carbonation to stay sealed in. These are also ideal for capping growlers when filling up at your local brewery. Simple and reliable, these lids meet the needs of everyday brewing and storage.