Kombucha Bottle Caps - Poly Cone Caps

Kombucha Bottle Caps with poly cone inserts provide a tight, leak-proof seal for Craft a Brew kombucha bottles and other 38 mm threaded containers. Designed for homebrewers who need a dependable closure that maintains carbonation, these caps create an air-tight fit suitable for kombucha, hard seltzer, and hard cider. Their secure seal helps protect beverages during storage and secondary fermentation while preserving fizz and freshness.

Each cap includes a removable poly cone insert that forms a precise seal inside the bottle neck, reducing the risk of leaks and pressure loss. The durable construction supports repeated use and provides a consistent closure that holds up during carbonation. These caps are available in packs of eight or twelve and are compatible with standard 38-400 bottle threads, making them a practical option for expanding a kombucha setup or replacing worn caps.

Crafted from reusable materials, the caps are designed for easy cleaning and everyday brewing use. The poly cone insert seats firmly within the bottle opening, supporting an even seal that helps maintain carbonation levels over time. Their compatibility with multiple beverage types makes them suitable for kombucha fermentations as well as carbonated cider or seltzer projects.

To use the caps, place the poly cone insert inside the cap if removed, then twist the cap securely onto a clean, dry bottle until firmly sealed. The tight closure helps maintain pressure during carbonation and prevents leaks when bottles are stored upright or transported. After use, the caps and inserts can be washed and reused for future batches.

Designed for small-batch brewers who want reliable carbonation retention, these Kombucha Bottle Caps provide a secure sealing solution for Craft a Brew bottles and other compatible containers. Their durability and consistent sealing performance make them a dependable choice for maintaining quality in homemade kombucha and carbonated beverages.