---
product_id: 57187364
title: "Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead"
brand: "fermentology"
price: "$53.74"
currency: USD
in_stock: true
reviews_count: 13
category: "Fermentology"
url: https://www.desertcart.us/products/57187364-carboy-caps-4-pk-silicone-caps-for-fermenting-in-3
store_origin: US
region: United States of America
---

# Automatic degassing airlock Fits all wide mouth Mason jars BPA & phthalate-free safety Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead

**Brand:** fermentology
**Price:** $53.74
**Availability:** ✅ In Stock

## Summary

> 🥒 Unlock the art of effortless, probiotic-rich fermentation at home!

## Quick Answers

- **What is this?** Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead by fermentology
- **How much does it cost?** $53.74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/57187364-carboy-caps-4-pk-silicone-caps-for-fermenting-in-3)

## Best For

- fermentology enthusiasts

## Why This Product

- Trusted fermentology brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safe, Durable & Reusable:** Made from BPA-free, phthalate-free materials designed for long-term, dishwasher-safe use.
- • **Dual-Function Airtight Lids:** Switch from fermenting airlock to fridge-sealing stopper in seconds for versatile storage.
- • **Probiotic Powerhouse at Home:** Craft tangy, gut-friendly sauerkraut, kimchi, and pickles loaded with natural probiotics.
- • **Effortless Fermentation Mastery:** Set it and forget it—automatic burping keeps your ferments perfect without monitoring.
- • **Universal Mason Jar Compatibility:** Works seamlessly with all wide mouth Mason jars—Ball, Masontops, Kerr, and more.

## Overview

The Sauer System Fermentation Airlocks 4-pack is a premium, BPA-free fermentation kit designed for wide mouth Mason jars. Featuring an automatic water barrier airlock that vents gases while blocking oxygen, it ensures perfect anaerobic fermentation without daily monitoring. Each set includes airtight lids and silicone stoppers for seamless transition from fermenting to fridge storage. Ideal for crafting probiotic-rich sauerkraut, kimchi, pickles, and more, this durable, dishwasher-safe system fits popular Mason jar brands and sizes, empowering home fermenters to create healthy, flavorful foods with ease.

## Description

Free delivery and returns on eligible orders. Buy Fermentology Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead at desertcart UK.

Review: Great System - This is a very good system for fermenting small batches imo, especially if one is into canning too, because jars become multi-purpose. I have five on the go currently, and I will be adding today's picked gherkins, and would have more fermenting if it wasn't for one major issue - desertcart Prime are now using Evri and our last few orders of this product have disappeared/been returned. Anyway, rant over. The lids are solid and easy to clean and beat any other small-batch system that I have used by a country mile. For large batches I use traditional crocks, but wouldn't hesitate to use these if I had suitable >2litre jars. Their glass weights are good too.
Review: Awesome - Takes the hassle out of burping active ferments

## Features

- HOME BREW 3/5/6 GAL CARBOY JUGS – For fermenting homemade wine, beer, mead, kombucha and more in glass jugs; the lids stretch to fit over the mouth of the jug for a universal fit
- INCLUDES 4 SILICONE LIDS/CAPS – Compatible with home fermenter or brew supplies and accessories, including airlocks, siphons, racking canes, tubing
- 2 CONNECTION TUBES WITH CAPS – Each lid has two tubes to connect with brewing accessories; tubes can be covered with included white caps; each lid includes 2 housing nubs to hold the caps when not in use
- TWIN CAPS DOUBLE AS A LID/CORK – Cover both tube connection openings to block off oxygen and create a seal with stopper caps; replaces need for corks
- FOOD AND DISHWASHER SAFE – Made of high-quality silicone that is food safe, BPA-free and phthalate-free; all parts can be washed in the dishwasher

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01H7G1NF0 |
| Best Sellers Rank | 1,204,515 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 133 in Fermentation Airlocks |
| Brand | Fermentology |
| Closure Type | Twist Lock |
| Colour | Stone |
| Container Shape | Round |
| Country of Origin | China |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,642) |
| Food Storage Container Airtightness | Airtight |
| Is the item dishwasher safe? | Yes |
| Is the item microwaveable? | Yes |
| Item Form | Mason jar |
| Item Package Quantity | 1 |
| Item Weight | 0.62 Pounds |
| Manufacturer | Fermentology |
| Material | Plastic |
| Material Features | BPA-free, phthalate-free |
| Other Special Features of the Product | Automatic Degassing |
| Product Care Instructions | Hand wash or use dishwasher. Reuse for long-term storage. |
| Recommended Uses For Product | Fermented foods, Long-term storage |
| Size | Wide Mouth 4PK |
| UPC | 829188000233 |
| Unit Count | 4 Count |

## Product Details

- **Brand:** Fermentology
- **Colour:** Stone
- **Material:** Plastic
- **Material feature:** BPA-free, phthalate-free
- **Recommended uses for product:** Fermented foods, Long-term storage

## Images

![Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead - Image 1](https://m.media-amazon.com/images/I/71Y1AoE7OAL.jpg)
![Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead - Image 2](https://m.media-amazon.com/images/I/812vmxLSWsL.jpg)
![Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead - Image 3](https://m.media-amazon.com/images/I/81Bku5M6gnL.jpg)
![Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead - Image 4](https://m.media-amazon.com/images/I/81JW2m3iBEL.jpg)
![Carboy Caps – 4 Pk Silicone Caps for Fermenting in 3/5/6 Gallon Glass Jugs – Homebrew Wine, Beer, Mead - Image 5](https://m.media-amazon.com/images/I/81iCrbKwnDL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: How wide are the lids in centimetres?**
A: 7cm internal dia

**Q: Do these fit the standard UK kilner jars? The ones for jam / canning wirh the 2 piece lids that come in 1 litre and half litre sizes?**
A: No

**Q: Has anyone tried washing the lids not airlock in the dishwasher?**
A: Yes no problem on daily wash

**Q: I’m looking for lids for the regular mouth. Where can I find these? Thanks**
A: You can find them on Amazon

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great System
*by M***D on 14 October 2022*

This is a very good system for fermenting small batches imo, especially if one is into canning too, because jars become multi-purpose. I have five on the go currently, and I will be adding today's picked gherkins, and would have more fermenting if it wasn't for one major issue - Amazon Prime are now using Evri and our last few orders of this product have disappeared/been returned. Anyway, rant over. The lids are solid and easy to clean and beat any other small-batch system that I have used by a country mile. For large batches I use traditional crocks, but wouldn't hesitate to use these if I had suitable >2litre jars. Their glass weights are good too.

### ⭐⭐⭐⭐⭐ Awesome
*by I***S on 17 July 2019*

Takes the hassle out of burping active ferments

### ⭐⭐⭐⭐⭐ Five Stars
*by N***S on 24 April 2018*

excellent product if you ferment vegetables etc

## Frequently Bought Together

- Fermentology Sauer System Fermentation Airlocks – Lids, Grommets, Gaskets, Stoppers – for Regular Mouth Mason Jars – 4 Pack
- Masontops Pickle Pebble Glass Infinity Weights for Fermenting - Pickling Weight Set - Small/Regular Mouth Mason Jar Fermentation
- Masontops Pickle Packer - Acacia Wood Vegetable Fermentation Tamper - Cabbage Sauerkraut Pounder - Fermenting Food Tool

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-11-15*