Glass Weights for Fermentation

By Masontops

Starting at $18.95

* Required Fields

Add to Wishlist


These glass weights ensure that vegetables stay below the surface of the brine, thereby eliminating exposure to mold-causing oxygen, which is the main cause of failure with lacto fermentation methods.

  • Materials: Pure soda-lime glass
  • Care: Clean weights before each use to prevent contamination. Hand wash weights 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
  • Includes four glass fermentation weights
  • Sized perfectly to be inserted & removed with ease
  • Ensures vegetables stay below the surface of the brine, thereby eliminating exposure to oxygen which causes mold
  • Heavy enough for one to keep everything submerged below the brine, but can also be stacked to provide extra weight
  • Made of non-iridized soda glass which is completely inert and ensures that no other substances leach into ferment
  • Food-safe, lead-free, and non-porous
  • Made in China
  • Dimensions: Regular: 2.1" x 2.1" x 0.5";
    Wide: 2.75" x 2.75" x 0.75"
  • Weight: Regular: 0.15 lb.; Wide: 0.41 lb.
  • Pack vegetables and brine into Mason jar with 1.75” headspace
  • Once vegetables and brine are packed in mason jar, place one glass weight on top and ensure it's slightly submerged
  • Remove any food that floats to the surface
  • Top off the jar with airlock or lid

4 Reviews (4.5 out of 5 Grommets)

Sorted by Rating

Wish I’d had these last summer

2/15/2019 by Laurie

These are exactly what you need for you home canning projects.



2/15/2019 by Miyuki

Great to keep things in the brine in jars of olives, kimchi, pickles, etc.


Great product

9/6/2017 by Joe

No issues whatsoever. Thank you for this platform for these wonderful products.


works well

2/16/2019 by Carol

still testing these out.

4 Item(s)

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.