Kombucha fermentation is a natural process in which symbiotic culture of bacteria and yeast transforms sweetened tea into probiotic-rich drink. Bacteria and yeasts convert sugars into organic acids, probiotics, and natural carbonation, creating a flavorful beverage that supports gut health and overall well-being.
Make Your Own Kombucha
Always fresh. Naturally fizzy. Rich in probiotics. Endless flavours.
Plain Kombucha
Endless Flavour
Naturally Sparkling
Probiotic
Continuous Brewing
Brew fresh kombucha tea at home without long waiting times. Kefirko helps you to control fermentation and makes perfect conditions for your kombucha.
With the Kombucha fermenter, your fermented tea is always ready to drink or use for second fermentation – no interruptions, no hassle.
Challenge
Kefirko Solution
Aerobic fermentation without contamination
✔
Control during fermentation
✔
Measuring portions accurately
✔
High -quality containers
✔
Structured process
✔
Always in stock
✔
Affordable – one-time buy and infinite batches
✔
Smart Features of Kombucha fermenter
Aerobic fermentation without contamination
LID WITH FERMENTATION STATION
The eco-friendly bioplastic lid is the hero of safe aerobic fermentation. It allows oxygen flow while blocking contaminants. The integrated fermentation station gives you precise control over fermentation conditions, all in one place.
ACTIVE CARBON FILTER
The small opening enables just enough airflow for the kombucha to ferment properly. But don’t worry about the weird smells, thanks to the active carbon filter covering it. It keeps everything smelling sweet, without any yucky odours sneaking out.
Control during fermentation
Without temperature and time control, kombucha can turn too sour or ferment inconsistently, build in Fermentation Station for consistent results.
THERMOMETER
The kombucha ferments best when it's kept at room temperature. With the handy thermometer provided, you can easily maintain the perfect temperature.
LITRE & OUNCE MARKINGS
Measuring portions accurately The 4-litre glass jar features clear markings on the back in both litres and ounces, making it easy to measure liquids accurately with every refill. Perfect for precise portions and consistent fermentation every time.
QUALITY GLASS JAR
Quality, non-reactive materials The transparent glass jar allows easy monitoring of fermentation, won’t react with acidic kombucha, and is simple to clean. The sustainable bioplastic lid complements the jar with durability and eco-friendly design.
STAINLESS STEEL SPIGOT & WOODEN STAND
Continuous Brewing with Tap The stainless steel spigot lets you pour kombucha directly from the fermenter, while the wooden stand ensures stability and easy access. Pour, refill, and let fermentation continue without interruption.
Prepare the best kombucha in the world. Choose your colour.
Live, organic kombucha starter is a symbiotic culture of bacteria and yeast that ferments sugar and tea into a refreshing, probiotic-rich, naturally fizzy kombucha. To make kombucha at home simply add it to sugar and tea and let it ferment.
You buy it once - it grows indefinitely.
Free access to Kefirko Club - exclusive recipes, lectures, customer support, special discounts, expert tips…
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Collection of Recipes, made by Experts!
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Benefits of Homemade Kombucha:
🍃 Naturally fermented & probiotic-rich
A refreshing alternative to sugary drinks and alcohol.
⚙️ Take full control
Adjust sweetness, choose quality ingredients, and avoid additives.
⚡ Naturally energizing
Gentle, sustained energy without stimulants or added sugars.
🦠 Probiotics for gut health
Raw, live cultures you won’t find in most store-bought kombucha.
✨ Fizz naturally
Real fermentation creates a refreshing natural sparkle.
🍓 Flavor your way
Create unique flavors with fruits, herbs, and spices.
♻️ Endless batches
One starter lets you brew continuously at home.
💚 Affordable & sustainable
Brew fresh daily, save money, and reduce packaging waste.
How to make Kombucha?
For 3.5 l of Kombucha you need:
1. Quality glass with a lid.
2. 14g black or green tea.
3. 175g of sugar.
4. 350 ml Kombucha starter or Kombucha SCOBY with liquid.
1.
Prepare tea. Use green, black or mixture of both teas. Cool it down and add sugar. Pour tea (and water) into the fermentation jar. Cool down to room temperature.
2.
Add kombucha starter and/or SCOBY with some liquid to the tea. (Always use at least 10% of the starter/kombucha tea for every new batch of kombucha).
3.
Ferment 7-10 days or less if you make jun kombucha. Taste during fermentation to find the right taste of kombucha.
4.
Take out the SCOBY and save 10% of liquid for the new batch.
5.
Kombucha is ready to drink. You can also store it in bottles or make continuous fermentation.
How to Flavour Kombucha?
1. Pure Kombucha
Kombucha from first fermentation, without SCOBY and starter liquid.
2. Add Flavours
Add fruit, juice, herbs or spices and ferment.
3. Bottle & Enjoy
Strain flavour ingredients, bottle and enjoy naturally flavoured kombucha.
“This is a wonderful product. Something I was searching for. Good work!”
Suzana Kranjec
fermentiraj.si
Rated 5 out of 5
“This is the best thing we can wish for in fermenting. Kefirko is a Slovenian brand and their accessories are really useful for all fans of fermented beverages.”
Customer reviews
Anonym
Rated 5 out of 5
“It took a week and it was here.. It made the process a lot easier to keep on the long run.. Would definitely suggest to ppl interested in making kombucha”
Giselle
Rated 5 out of 5
“I already own and regularly use several Kefirko products. When I decided to start brewing kombucha and Jun, I was convinced by their stainless steel spigot to buy the 4L fermenter. Typical of Kefirko, all parts of their products are of very well thought out design and high quality. This was a key buying criteria for me when working with highly acidic liquids.
This is lab glass quality. The set up makes it a breeze to switch SCOBYs, fill and mix properly, and track the temperature and taste of the ferment as it proceeds through the days–all in one compact footprint. Top notch.”
Includes
1 – Fermentation clock 2 – Top lid 3 – Thermometer 4 – Oddour Neutraliser 5 – Sealing ring 6 – Glass jar 7 – Stainless steel spigot 8 – Wooden stand 9 – Booklet with instructions and access to recipes
It took a week and it was here.. It made the process a lot easier to keep on the long run.. Would definitely suggest to ppl interested in making kombucha
Rated 5 out of 5
Mel –
vital products. make things 10x easier
Rated 2 out of 5
Kevin Bauer –
Alles sorgfältig verpackt und geliefert nur der Thermostat ist leider defekt.
Rated 5 out of 5
Tanja S. –
Rated 5 out of 5
Gisela –
Super durchdachtes Produkt, klare Kaufempfehlung!
Rated 3 out of 5
Anonymous –
Plastic ring of the top cover comes off too easily. The filter of the tap gets clogged almost immediately. The characters of the thermometer are too small. The bamboe stand was broken during transport, it doesn’t seem to be strong enough. The stand was quickly replaced by customer service 🙂
Rated 5 out of 5
Anonymous –
I first received the wrong product, but the problem was solved immediately. Thank you for the quick service!
Rated 5 out of 5
Mitchel –
Great product, very good service.
Rated 5 out of 5
kristijan grabar –
Rated 5 out of 5
Jacomijn –
Vorige week gestart, ben benieuwd hoe het gaat.
Rated 5 out of 5
Giselle –
I already own and regularly use several Kefirko products. When I decided to start brewing kombucha and Jun, I was convinced by their stainless steel spigot to buy the 4L fermenter. Typical of Kefirko, all parts of their products are of very well thought out design and high quality. This was a key buying criteria for me when working with highly acidic liquids. I was very grateful when the company immediately sent me a new glass to replace the one I had received, which had some smeared markings. The real joy lies in admiring an evolving brew with a 360° view. This is lab glass quality. The set up makes it a breeze to switch SCOBYs, fill and mix properly, and track the temperature and taste of the ferment as it proceeds through the days–all in one compact footprint. Top notch.
Rated 5 out of 5
Gaja –
Good quality product and excellent costumer service.
Rated 5 out of 5
Anonymous –
Rated 5 out of 5
Mirela –
Rated 5 out of 5
irena gruntar –
Rated 5 out of 5
Marjana P. –
Posoda je ok, kombuca – klobuk se pa ne naredi. Sladko je dovolj, morda ni temperatura??
sara.k –
Pozdravljeni, kako dolgo že fermentirate kombučo? Kako temperaturo imate? Kombuča je fermentira, če zaznate kiselkast vonj in okus (postaja manj sladka) ter tudi mehurčke. Gobica na vrhu ni nujni del fermentacije in včasih, da se naredi potrebuje malo več časa. Če zaznavate znake fermentacije, je vse ok. Za dodatna vprašanja in pomoč nam pišite na mail: info@borgla.com.
Rated 5 out of 5
Saša R. –
Rated 5 out of 5
Inese Serge –
Rated 5 out of 5
maja –
Rated 5 out of 5
Marco Nooijer –
Great big jar for fermenting my kombucha
Rated 5 out of 5
Anonymous –
First time it arrived broken. Customer service replied within 2 minutes (!!) and they immediately sent me a new one
Rated 5 out of 5
Ewa S. –
The best device to make kombucha! Well-designed and high quality. Love it! I can’t imagine brewing without it now.
It took a week and it was here.. It made the process a lot easier to keep on the long run.. Would definitely suggest to ppl interested in making kombucha
Rated 5 out of 5
Mel –
vital products. make things 10x easier
Rated 2 out of 5
Kevin Bauer –
Alles sorgfältig verpackt und geliefert nur der Thermostat ist leider defekt.
Rated 5 out of 5
Tanja S. –
Rated 5 out of 5
Gisela –
Super durchdachtes Produkt, klare Kaufempfehlung!
Rated 3 out of 5
Anonymous –
Plastic ring of the top cover comes off too easily. The filter of the tap gets clogged almost immediately. The characters of the thermometer are too small. The bamboe stand was broken during transport, it doesn’t seem to be strong enough. The stand was quickly replaced by customer service 🙂
Rated 5 out of 5
Anonymous –
I first received the wrong product, but the problem was solved immediately. Thank you for the quick service!
Rated 5 out of 5
Mitchel –
Great product, very good service.
Rated 5 out of 5
kristijan grabar –
Rated 5 out of 5
Jacomijn –
Vorige week gestart, ben benieuwd hoe het gaat.
Rated 5 out of 5
Giselle –
I already own and regularly use several Kefirko products. When I decided to start brewing kombucha and Jun, I was convinced by their stainless steel spigot to buy the 4L fermenter. Typical of Kefirko, all parts of their products are of very well thought out design and high quality. This was a key buying criteria for me when working with highly acidic liquids. I was very grateful when the company immediately sent me a new glass to replace the one I had received, which had some smeared markings. The real joy lies in admiring an evolving brew with a 360° view. This is lab glass quality. The set up makes it a breeze to switch SCOBYs, fill and mix properly, and track the temperature and taste of the ferment as it proceeds through the days–all in one compact footprint. Top notch.
Rated 5 out of 5
Gaja –
Good quality product and excellent costumer service.
Rated 5 out of 5
Anonymous –
Rated 5 out of 5
Mirela –
Rated 5 out of 5
irena gruntar –
Rated 5 out of 5
Marjana P. –
Posoda je ok, kombuca – klobuk se pa ne naredi. Sladko je dovolj, morda ni temperatura??
sara.k –
Pozdravljeni, kako dolgo že fermentirate kombučo? Kako temperaturo imate? Kombuča je fermentira, če zaznate kiselkast vonj in okus (postaja manj sladka) ter tudi mehurčke. Gobica na vrhu ni nujni del fermentacije in včasih, da se naredi potrebuje malo več časa. Če zaznavate znake fermentacije, je vse ok. Za dodatna vprašanja in pomoč nam pišite na mail: info@borgla.com.
Rated 5 out of 5
Saša R. –
Rated 5 out of 5
Inese Serge –
Rated 5 out of 5
maja –
Rated 5 out of 5
Marco Nooijer –
Great big jar for fermenting my kombucha
Rated 5 out of 5
Anonymous –
First time it arrived broken. Customer service replied within 2 minutes (!!) and they immediately sent me a new one
Rated 5 out of 5
Ewa S. –
The best device to make kombucha! Well-designed and high quality. Love it! I can’t imagine brewing without it now.
25 reviews for Kombucha Fermenter 4l
Jasmina –
Patrick –
Anonym –
It took a week and it was here.. It made the process a lot easier to keep on the long run.. Would definitely suggest to ppl interested in making kombucha
Mel –
vital products. make things 10x easier
Kevin Bauer –
Alles sorgfältig verpackt und geliefert nur der Thermostat ist leider defekt.
Tanja S. –
Gisela –
Super durchdachtes Produkt, klare Kaufempfehlung!
Anonymous –
Plastic ring of the top cover comes off too easily. The filter of the tap gets clogged almost immediately. The characters of the thermometer are too small. The bamboe stand was broken during transport, it doesn’t seem to be strong enough. The stand was quickly replaced by customer service 🙂
Anonymous –
I first received the wrong product, but the problem was solved immediately. Thank you for the quick service!
Mitchel –
Great product, very good service.
kristijan grabar –
Jacomijn –
Vorige week gestart, ben benieuwd hoe het gaat.
Giselle –
I already own and regularly use several Kefirko products. When I decided to start brewing kombucha and Jun, I was convinced by their stainless steel spigot to buy the 4L fermenter. Typical of Kefirko, all parts of their products are of very well thought out design and high quality. This was a key buying criteria for me when working with highly acidic liquids. I was very grateful when the company immediately sent me a new glass to replace the one I had received, which had some smeared markings. The real joy lies in admiring an evolving brew with a 360° view. This is lab glass quality. The set up makes it a breeze to switch SCOBYs, fill and mix properly, and track the temperature and taste of the ferment as it proceeds through the days–all in one compact footprint. Top notch.
Gaja –
Good quality product and excellent costumer service.
Anonymous –
Mirela –
irena gruntar –
Marjana P. –
Posoda je ok, kombuca – klobuk se pa ne naredi. Sladko je dovolj, morda ni temperatura??
sara.k –
Pozdravljeni,
kako dolgo že fermentirate kombučo? Kako temperaturo imate?
Kombuča je fermentira, če zaznate kiselkast vonj in okus (postaja manj sladka) ter tudi mehurčke. Gobica na vrhu ni nujni del fermentacije in včasih, da se naredi potrebuje malo več časa. Če zaznavate znake fermentacije, je vse ok. Za dodatna vprašanja in pomoč nam pišite na mail: info@borgla.com.
Saša R. –
Inese Serge –
maja –
Marco Nooijer –
Great big jar for fermenting my kombucha
Anonymous –
First time it arrived broken. Customer service replied within 2 minutes (!!) and they immediately sent me a new one
Ewa S. –
The best device to make kombucha! Well-designed and high quality. Love it! I can’t imagine brewing without it now.
Michael –
Show only reviews in English (14)