Mason Jar Fermentation Kit

By Masontops

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Everything you need to make nutrient-rich, good-for-the-gut ferments. These mason jar fermenting lids screw directly to mason jars, keeping out air while also letting gases escape—so you don’t have to periodically burp the jar. The kit also includes instructions, recipes, glass weights, and even a vegetable tamper to help release moisture from veggies directly in the jar.

  • Materials: Pure soda-lime glass, silicone, acacia wood
  • Includes 4 waterless airlocks for wide-mouth mason jar fermentation in assorted colors (blue, purple, teal, red), 4 glass weights for wide mouth mason jars, 1 vegetable fermentation tamper, and a fermentation guide with recipes, instructions, and fermentation tips
  • Airlocks allow internal gases to escape, eliminating the risk of mold and need for daily monitoring during fermentation
  • Glass weights are made of non-iridized soda glass that are inert and ensure vegetables stay below the surface of the brine, eliminating exposure to oxygen which causes mold
  • Vegetable tamper is used for packing vegetables for fermentation and is made from all-natural, untreated acacia wood
  • Has enough supplies for 4 simultaneous ferments
  • All components made from food-safe and lead-free materials
  • Airlocks made from BPA- and phthalate-free food-grade silicone
  • Made in China
  • Dimensions: 12.1" x 9" x 4.6"
  • Weight: 3.75 lbs.
  • Clean weights and airlocks before each use to prevent contamination
  • Hand wash weights and airlocks with warm water and soap or clean in top rack of dishwasher. If using the dishwasher, avoid extreme heat settings (i.e., "steam")
  • Do not boil glass weights
  • Hand wash vegetable fermentation tamper with warm soapy water only
  • Occasionally oiling tamper will help to protect and condition the wood
  • Tamper not dishwasher safe and should never be allowed to stand in water as it may damage the wood

16 Reviews (5 out of 5 Grommets)

Sorted by Rating

like it

10/19/2018 by R. K.

This was a gift; she said this assortment worked very well.


Fun and practical

8/16/2018 by Linda

This will be a very practical addition to my kitchen. Now if I could only find wide-mouth canning jars....


Try Fermentation!

8/5/2018 by Leonore

Easy and less expensive way to try fermentation. Simple to follow directions. Love it.


Great way to make small batch fermented foods

7/26/2018 by Carol

Now I can make my favorite kraut without traditional issues


This was a gift

7/25/2018 by Connie Jo

This was given as a gift. He says he really liked it.

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Masontops | Mason Jar Fermentation

About Masontops

Good for the Gut

Take the guesswork out of home fermentation. This mason jar fermenting lid creates the perfect anaerobic environment to make sauerkraut, pickles, kimchi, and other ferments.

There’s less daily maintenance, too, compared to other techniques. The lid keeps air out but is designed to let gases escape, so you don’t have to burp it every day. Plus, mason jars are pretty easy to get a hold of—you can even use ones you already own. Just screw the airlock lid onto jar and wait for the good bacteria to emerge.

Fermentation is good for you because of that bacteria. It can boost your gut health, strengthen your immunity, and improve your body's ability to absorb nutrients.

Whether you’re experienced or new to the craft, Masontops’ kit equips you with everything you need (instructions, recipes, glass weights, and even a vegetable tamper to help release the veggie’s brine directly in the jar).

Make room on your counter for your very own batches of fermented goodness. Your gut will thank you.