Price: $26.99
(as of Jul 01, 2025 15:42:17 UTC – Details)
Product Description
Fermentaholics Silicone Airlock Fermentation Lids for Wide-Mouth Mason Jars. 
Simple One-Piece Design: Instantly transforms wide-mouth mason jars into fermenters without the need for extra accessories like bands or water airlocks. Perfect for making sauerkraut, kimchi, pickles, vinegar, hot sauce, and other probiotic-rich foods at home.
Built-in Self-Venting Airlock 
The built-in one-way airlock releases carbon dioxide while blocking oxygen, ensuring your ferments stay protected from contaminants. Easy, Hassle-Free Fermentation: No extra equipment or maintenance is required—just set it up and let the fermentation process do the work.
Patented Design
Careful, Convenient, And Crafted Design
Designed to grip all standard wide-mouth mason jars, these fermentation lids take the guesswork out of “burping” your ferments as the one-way release valve in the middle of the lid releases all the carbon dioxide necessary for your fermentation, turning vegetables, eggs, & more into our favorites.
One Piece Of Equipment
Fermenting Foods Has Never Been Easier
Tired of complex fermenting contraptions and lids? Separate pumps and gadgets and techniques that are difficult to master are long gone: Introducing Fermentaholics Silicone Airlock Fermentation Stretch Lids. With one piece of equipment, you can now ferment all your favorites.
No More Rusty Tin Bands
The Last Fermentation Lid You’ll Ever Purchase
You will receive four silicone airlock stretch fermentation lids coming in four different colors, so right away you can start with multiple batches and organize them by color or just use your favorite. These fermentation lids from BPA-free silicone are durable, reusable, and dishwasher safe so easy to clean. Don’t worry about rusty tin bands that warp over the years – these silicone lids are made and designed to be the last fermentation lid you’ll ever purchase.
Versatile Fermentation Uses 
Our silicone airlock fermentation stretch lids are the final answer to your home fermenting needs. With one piece, you can truly “set it and forget it.”
Shop our Full Line of Fermentation Supplies
Certified Organic Pickling Spice
Extremely Versatile Seasoning – Try it for all Pickling Needs Including Eggs, Vegetables, and Meats.
Fermentation Glass Weights
Enough Weight And Flat Bottom For Keeping Fruits & Veggies Under The Brine Without Mold And Oxidation Effectively, More Reliable And Convenient Than Diy.
Premium Quality Natural Acacia Wood
Made from sustainably sourced premium acacia wood, our tamper is as durable as it is stunning. Known for its strength and beautiful grain, it’s an essential tool for any home fermentation setup.
Fermentaholics Jarkers – Wet Erase Jar Markers
Fermentaholics Jarkers make it easy to keep track of your brew and note the start date, ingredients, batch number, and other important details right onto your brewing vessel
Kombucha And Fermentation pH Test Strips
Take The Guess Work Out – Our pH Test Paper Strips Ensure Your Brew Is Balanced & Fermenting Safely Within The Proper pH Range.
Kombucha Brewing and Fermentation Heat Mat
Raise the temperature of your brew between 5° and 20° F over ambient temperature, depending on the mat’s placement. Quickly and easily monitor your brew’s temperature.
PATENTED FERMENTATION STRETCH LIDS – Just One Single Piece, Each Silicone Stretch Airlock Lid Immediately Turns Any Wide Mouth Mason Jar Into A Vegetable Fermenter; No Pesky Bands, Rings, Water, Or Maintenance Needed!
SET IT AND FORGET IT – Our Self Burping Silicone Fermentation Stretch Lids Are Designed To Grip The Top Of Any Standard Sized Wide Mouth Mason Jar Creating An Air-tight Seal. Simultaneously, Each Lid Is Equipped With A One-way Pressure Release Valve; This Waterless Airlock Allows Built-up Carbon Dioxide Gas To Escape During Fermentation Without Allowing Oxygen Into Your Fermenter, Protecting Your Batch From Outside Contaminants.
HOMEMADE PROBIOTIC-RICH FOOD MADE EASY: Fermentation Stretch Lids Are Perfect For All DIY Fermentation Needs. Make Your Own Pickles, Sauerkraut, Ginger, Pickled Eggs, Kimchi, Vinegar, Hot Sauce & More. Get Creative And Create Your Own Fermented Vegetable Blend From Cucumbers To Carrots, Cabbage, Tomatoes, Radishes, Garlic & More. Natural, Economic Probiotics Made Simple. What Will You Make?
NO HASSLE FOOLPROOF FERMENTATION: Fermenting Veggies Shouldn’t Be Tricky, And Neither Should The Equipment Being Used. All You Need To Ferment Veggies Is A Single Item – A Fermentation Silicone Stretch Lid—No Need To Tinker Around With Crazy Contraptions, Gadgets, Hand Pumps, Rings, Bands, Accessories, Or Water. Just Place The Lid On Your Jar And Wait.
Our Fermentation Stretch Lids Are Made From The Highest Quality Silicone – Strong, Durable, And Reusable. They Are BPA-Free , Contain No Phthalates, And Are Easy To Clean. Perfect For Use With All Small Batch Fermentation And Pickling Needs.
Customers say
Customers find the fermentation lid works well and is easy to use, with one mentioning it made their first batch successful. Moreover, the product helps make good pickles. However, customers report issues with air flow, noting that air goes into the jar instead of out through the vent. Additionally, the lid’s sturdiness receives negative feedback, with customers describing it as flimsy.
Leo –
Made good pickles
Used for one batch. They were easy to wash before I used them. No problem stretching over a standard wide-mouth canning jar. I used 1 quart jars. They feel thin to stretch over something that’s pretty big but didn’t seem near tearing. Most guys are familiar with this experience LOL. I haven’t tried a wider-mouthed jar like some other reviewers posted. They sealed well. I used a glass weight to hold the vegetables under the brine. The pickles produced are good. Try eating pickles with fresh hot rice if you haven’t before.
Amazon Customer –
Very good for fermenting!
These rubber jar covers work really well at keeping dust and bacteria out while letting gasses and fluids out during the fermentation process. They take a little stretching in your hand first but after they’ve relaxes a bit, they fit and seal quite well over most wide mouth jars! Very easy to use and I’ve used one multiple times and it’s still good to use again!
CS –
Does the job and easy to use.
Only reason I gave it 4 instead of 5 stars for “leakproof” is I didn’t leave enough headspace in my jar and it bubbled up through the vent hole….my fault really!
Wilhelmina Latupeirissa –
Good product
Good product
Leslie –
Great idea, bad product
1 – the valve leaks and air goes in the jar 2 – it’s easy to dislodge the tiny metal ball inside the valve while you are cleaning the lid. Tiny ball disappears into your sink and the thing now is worthless. So not a durable product.
motojo –
Great product
Very easy to use. They make fermentation projects fun and easy to maintain. I plan to order more next season
Sharon Kaster –
Really thin and Ballon like material
Seams kinda flimsy. Just put one on my Fire Cider and will see how it does. I will update as the fermentation process goes.
angela –
Ferment lids
I really liked these better than the pumps
Javier –
Muy cercano a lo que buscaba, una evaluación más completa la daré con el uso. De momento satisfecho con el producto
Marie –
Great idea, I have been using them for almost 2 years, but these lids do not vent the gases during lacto fermentation, you still have to burp them.