French Glass Fermentation Jars, Airlocks & Tools

For sauerkraut, kimchi, fermented pickles, sourdough starters, cultured drinks, and small-batch fermentation at home.

French glass fermentation jars, The Little Fermenter airlock system, sourdough starter jar, and cultured drink bottles in a premium kitchen setting.
New to fermenting?Start with the method, then choose the right jar.
VISIT FERMENTING 101Coming soon

Fermentation can be as simple as food, glass, and time, but the right setup depends on what you are making. Use The Little Fermenter for airlock-controlled lacto-fermentation, choose Le Parfait Super Jars or Super Terrines for traditional wire-bail fermentation, or select roomy glass jars for maintaining a sourdough starter.

Le Parfait glass makes it easy to monitor brine levels, bubbles, expansion, and texture as each ferment develops. Browse the collection, compare the four primary fermentation methods, and visit Fermenting 101 for detailed guidance on salt, brine, headspace, temperature, storage, and troubleshooting.

Why Le Parfait Glass Is Built for Fermentation

Fermentation is a living process, and clear glass lets you observe it without unnecessarily disturbing the contents. You can monitor whether vegetables remain submerged, follow changes in color and texture, and track visible activity through the jar. The smooth glass surface cleans thoroughly between projects and does not retain the strong aromas associated with cabbage, garlic, and spice.

Le Parfait offers several vessel and closure styles, allowing you to match the glass to the method, from The Little Fermenter airlock system and traditional wire-bail vegetable fermentation to sourdough starters and cultured drinks.

Discover the history of Le Parfait glass
Lacto-Fermentation with The Little Fermenter

The Little Fermenter combines an airlock, internal press, and water moat in one compact stainless steel device. The press helps hold ingredients beneath the brine, while the airlock allows fermentation gases to escape without routinely opening the jar.

The Little Fermenter works only with selected Le Parfait Familia Wiss Terrines and Screw Top Jars featuring a 100 mm opening. Choose the complete Kit when you need both the device and compatible glassware, or choose The Little Fermenter Solo when you already own a compatible jar. Super Jars and Super Terrines are not compatible with The Little Fermenter.

Learn The Little Fermenter Method
Traditional Wire-Bail Fermentation

Super Jars and Super Terrines support a traditional wire-bail fermentation method without The Little Fermenter. Ingredients are packed beneath the brine using a weight or outer leaf, and the jar is closed using its glass lid, fresh rubber gasket, and wire-bail mechanism. Depending on the recipe and process, pressure may be released periodically, a practice commonly called "burping."

Super Jars offer the classic rounded Le Parfait silhouette, while Super Terrines provide a wider opening and straighter sides for easier packing and serving. Always use a recipe and process specifically written for the selected vessel and fermentation method.

Learn Traditional Wire-Bail Fermentation
Sourdough Starter Fermentation

A sourdough starter is a living culture of flour and water maintained through regular feedings. As wild yeast and bacteria become active, the starter develops bubbles, expands, and creates the natural leavening used in sourdough bread.

Clear glass makes it easy to mark the starter level, monitor its rise and fall, and observe changes in texture and activity. Choose a jar with enough room for expansion, a wide opening for simple stirring and feeding, and sides that make growth easy to track. Follow a sourdough-specific method rather than sealing the jar airtight during active fermentation.

Learn How to Build a Sourdough Starter
Cultured Drinks & Dairy

Cultured drinks and dairy follow different fermentation processes from submerged vegetables and sourdough starters. Kefir, kombucha, yogurt, and naturally fermented beverages each have their own temperature, airflow, closure, and storage requirements.

Selected jars can support preparation and culturing when used according to the recipe, while Le Parfait Bottles provide an elegant way to portion, refrigerate, serve, and store finished cultured drinks. Active fermentation in a sealed bottle can create pressure, so use only a tested recipe and a bottle appropriate for the intended process.

Explore Cultured Drinks & Dairy
Choosing the Right Vessel for Your Method

Match the vessel to the process, not only to the batch size. Use The Little Fermenter with selected 100 mm Familia Wiss Terrines and Screw Top Jars. Choose Super Jars or Super Terrines for traditional wire-bail vegetable fermentation.

Select a roomy, easy-to-clean glass jar for maintaining sourdough starter, and explore Bottles for portioning and storing kefir, kombucha, fermented sodas, and other cultured drinks. For salt ratios, brine management, headspace, temperature, storage, and troubleshooting, continue to Fermenting 101.

Find the Right Jar Size

Browse the Collection

Best for Beginners

The Little Fermenter Kit

The complete airlock, internal press, water-moat system, and compatible jar for manageable batches of lacto-fermented vegetables.

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For Compatible Jars

The Little Fermenter Solo

The all-in-one fermentation device without an additional jar, for selected Le Parfait vessels with a 100 mm opening.

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The Little Fermenter Compatible

Screw Top Jars

Selected 100 mm wide-mouth Screw Top Jars for use with The Little Fermenter and versatile kitchen storage.

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The Little Fermenter Compatible

Familia Wiss Terrines

Wide-mouth, straight-sided 100 mm terrines designed for easy packing, pressing, monitoring, and serving.

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Traditional Method

Super Jars

Iconic wire-bail glass jars for traditional vegetable fermentation with periodic pressure release when directed by the recipe.

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Wide-Mouth Fermentation

Super Terrines

Straight-sided wire-bail jars that make cabbage, vegetables, and larger ingredients easier to pack and remove.

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Cultured Drinks

Bottles

Glass bottles for portioning, serving, refrigerating, and storing kefir, kombucha, fermented sodas, and other finished cultured beverages.

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Prep to Brine

Fermentation Tools & Accessories

Salts, spice blends, pounders, shredders, books, replacement parts, and tools for preparing and managing fermentation projects.

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Watch & Learn

How to Ferment with The Little Fermenter

Assemble the device, fill and maintain the water moat, position the internal press, and prepare a compatible 100 mm Le Parfait jar for small-batch vegetable fermentation.

Make Kimchi in a Le Parfait Super Jar

Learn how to prepare, pack, submerge, monitor, and manage kimchi using the traditional wire-bail jar method without a separate airlock.

Make and Maintain a Sourdough Starter

Create a flour-and-water starter, track its rise in clear glass, and learn the basic feeding and maintenance rhythm for a healthy active culture.

Fermentation FAQ

What is The Little Fermenter?

The Little Fermenter is an all-in-one lacto-fermentation device combining an airlock, internal press, and water moat. It is designed to allow fermentation gases to escape, help limit outside air exposure, and hold vegetables beneath the brine when used with a compatible jar.

What is the difference between The Little Fermenter Kit and Solo?

The Kit includes The Little Fermenter device and a compatible Le Parfait glass jar. The Solo includes the fermentation device only for customers who already own a compatible jar.

Which Le Parfait jars work with The Little Fermenter?

The Little Fermenter works only with selected Le Parfait jars featuring a 100 mm opening, including compatible Familia Wiss Terrines (350 mL, 500 mL, 750 mL, 1L d100) and Screw Top Jars (1L, 2L). Check the compatibility guide for exact sizes before ordering.

Does The Little Fermenter fit Super Jars or Super Terrines?

No. Super Jars and Super Terrines use wire-bail glass lids and do not accept The Little Fermenter device. They are suited to traditional wire-bail fermentation methods instead.

Can I ferment without an airlock?

Yes. Super Jars and Super Terrines can be used for traditional fermentation methods that involve monitoring the ferment and releasing pressure when required. Follow a method specifically written for wire-bail jar fermentation.

Do I need to burp a jar fitted with The Little Fermenter?

You do not routinely open the jar to release fermentation gas. The device vents gas through its airlock system. Maintain the water moat and follow the setup and care instructions supplied with the device.

What foods can I ferment in Le Parfait glass?

Common projects include sauerkraut, kimchi, brined cucumbers, carrots, radishes, hot-sauce ingredients, sourdough starter, kefir, kombucha, yogurt, and fermented beverages. Each method requires its own vessel, closure, temperature, airflow, and storage guidance. Explore all fermentation recipes.

Which Le Parfait jar is best for sourdough starter?

Choose a clear jar with a wide opening for easy feeding and cleaning, enough extra capacity for the starter to expand, and sides that make growth easy to track. Use the lid according to the sourdough method rather than sealing the jar airtight during active fermentation.

Can I actively ferment kefir, kombucha, or soda in Le Parfait bottles?

Use Bottles only according to a tested recipe and the bottle's intended use. Active beverage fermentation can create internal pressure. Bottles are well suited to portioning, serving, refrigerating, and storing cultured drinks, but any secondary fermentation instructions must address pressure, closure, temperature, and refrigeration.

Where can I find fermentation safety and troubleshooting help?

Visit Fermenting 101 (coming soon) for guidance on salt ratios, brine, submersion, headspace, temperature, storage, normal fermentation activity, surface growth, and when a batch should be discarded.