Profile: Bouche, Berlin, Germany

Continuing the deep dive into companies on the list of 20 Premium Kombucha brands published on August 11, 2026. We invited any on that list to contact us with more details. Bouche is one of Germany’s largest kombucha breweries, based in Berlin. I interviewed co-founder and CEO Walker Brengel. The podcast of our conversation is at the end of this post.

Walker heads up a team of nine producing 350,000 liters of kombucha annually–over a million bottles in three distinct categories: Core Kombucha, Pet Nats, and Proxys. Core Kombucha is the foundation — fermented tea in a range of flavor profiles, from citrus-fresh to aromatic and spiced. The Pet Nats are the sparkling option, naturally carbonated, suited to aperitif moments or as a companion to food. The Proxys are alcohol-free wine analogs, designed for pairings and occasions that offer the experience of wine without the alcohol.

Seasonal products come and go, often in limited runs. The online shop always reflects the current availability. The lineup is as follows.

Core Kombucha 330ml

The “Core 0.33” kombucha range is brewed from carefully selected teas and botanicals—resulting in dry, refreshing, and complex drinks with balanced acidity and low sugar content. They are designed for everyday enjoyment while retaining their complexity and character. Available in a range of flavors.

• LEMONDROP: The first flavor they made in 2019. The name comes from the hop variety.
• EARLYBIRD: Bergamot and caramel.
• HYBISKUS7: Hibiscus and jasmine.
• CHEEERRY.: Fruity depth of the coffee cherry.
• MANDARINE: Dry and aromatic, with a clear structure. White tea and jasmine open up to notes of apricot and stone fruit, followed by a fresh lift of mandarin. Citrus zest adds tension, while the finish remains pleasantly tart and juicy, without any cloying sweetness.

The 330ml kombucha bottles sell for $3.57 a bottle.

Premium Kombucha

Beyond the ‘Core’ line there are two varieties of Premium kombucha: the Pet Nat and Proxy range.

With the Pet Nats and the Proxies, we go more after a generally drier profile. Essentially keeping the acids rounded out. Because with acetic acid, if you think of it like a mountain, it’s the peak of the mountain, and we’re trying to go for hills. And I think with these you can get a lot of dynamics if one acid in particular isn’t overpowering.

It creates an experience of wine without trying to be the wine It’s geared to any moment where you drink wine. But obviously you’re not trying to be the wine, you’re just trying to have the ability to give that experience. Therefore, the flavors are drier. They don’t have a lingering sugary sweetness in your mouth.

Pet Nat 750ml

Pet Nat stands for Pétillant Naturel: the carbonation comes from natural bottle fermentation rather than added carbonation. Sealed after bottling to preserve the drink’s character.

HIBISCUS – A dry-style interpretation of kombucha, featuring a fine, champagne-like effervescence. Hibiscus infusion and jasmine tea lay an elegant foundation. Orange blossom adds a delicate, clear floral note, while fresh bergamot peel provides a citrusy kick and a refined, sophisticated bitterness on the finish. The result is bright.

MELON SZECHUAN – Combines fresh cantaloupe with spicy Szechuan pepper, creating a rich, full-bodied flavor with an effervescent mouthfeel. It begins with fruity, floral notes that—after a brief pause—transition into citrusy nuances, before a subtle mineral tone accompanies the finish.

JUNIPER – Combines the earthy, resinous essence of juniper berries with fresh citrus notes and the subtle bite of long pepper. Sparkling, botanical, and dry. This is the aperitif to pour yourself after a long day. Juniper sets the tone without being overpowering; it is balanced by an acidity that keeps the palate fresh and a gentle peppery finish that adds length. Botanical, precise—a bit like a non-alcoholic gin and tonic, but with more character and without the compromise of added soda water. Serve well-chilled in a large glass with an ice cube and a sprig of fresh rosemary or thyme. Enjoy before a meal, during aperitif hour, or simply whenever the moment calls for something special.

The 750ml Pet-Nat flavors sell for $16 a bottle.

Proxy 750ml

PROXY is created for people who want the experience of drinking a fine wine, without the alcohol. Fermented with tea, fruit, and botanicals.

PROXY A – Combines applewood-smoked oolong with distilled fig leaf essence, creating a smooth, buttery flavor with a savory, salty finish. Smoky, complex, yet elegant. If the first sip takes you by surprise, you’re on the right track. The smoke hits first, followed by the buttery notes of the oolong, leaving behind a subtle saltiness that leaves you craving another sip. PROXY A is not a lightweight drink; it is meant to be paired with food—aged cheese, a slice of smoked salmon, a well-seasoned pasta dish with brown butter, or simply a quiet evening with a good book. It is best enjoyed in a wine glass at room temperature or lightly chilled. Once poured, let it sit for a few minutes to allow the flavors to fully unfold.

PROXY B – A non-alcoholic wine alternative fermented with tea, fruit, and botanicals. Locally sourced quince, walnut, and apricot create a complex flavor profile: fruity and slightly tart, with notes of tobacco and a subtle depth derived from white tea. Quince and apricot lend a warm, ripe fruitiness that is neither too sweet nor too tart. The walnut contributes tannins and a slight astringency—something felt rather than tasted. The finish is long, dry, and driven by the tannins. It is reminiscent of a fine white wine, yet it strikes a different chord. Because it is something different. It is best enjoyed in a wine glass, lightly chilled to around 12°C. Pair it with a light salad, pan-seared fish, white asparagus, or goat cheese. Those who appreciate regional ingredients and enjoy making new discoveries will find a sparkling companion with a similar character in PROXY D.

PROXY C – A carbonated, fermented tea infusion featuring Genmaicha, Sencha, and kaffir lime leaves. Genmaicha combines Sencha with roasted rice, providing nutty, earthy notes. Sencha offers a fresh, slightly sweet base. Kaffir lime leaves contribute a zesty, floral citrus aroma that enlivens and refines the blend.

PROXY E – A unique composition of fermented honeycomb, silverberry, and vacuum-distilled sage, set against a base of Snow Bud white tea. The honeycomb imparts gentle warmth and resinous depth, while silverberry contributes subtle acidity and tannins. Sage provides a clear, woody, aromatic structure. Snow Bud tea rounds it all off with stone-fruit notes of apricot. A delicate, light-colored beverage with a mineral finish. PROXY E is the deepest in the PROXY line. It unfolds slowly: first the resinous quality of the honeycomb, then the fine tannic structure of the silverberry, followed by that dry, sage-green finish with a mineral edge. It is a drink made for food—pairing beautifully with fish, mild cheeses, light vegetable dishes, and anything that has texture but doesn’t require an overpowering flavor profile. Best served in a wine glass, chilled to around 10°C. The first sip reveals the profile; the second confirms it. For those seeking even greater depth, PROXY A offers it.

PROXY F – A cold-brewed infusion of aged Pu-erh, refined with Sichuan pepper, ginger, and a hint of soy sauce. The earthy depth of the Pu-erh anchors the entire composition. Sichuan pepper delivers a tingling warmth, while ginger adds a cool, invigorating note. The soy sauce works in the background—not as a distinct flavor, but as a sense of weight and depth that rounds everything out. Dark, complex, and crafted for the dining table.

Proxy D – Combines carefully fermented white and green jasmine tea with natural ingredients such as apricot, sea buckthorn, and tarragon. The result is a complex flavor profile featuring fruity freshness, subtle herbal notes, and a balanced acidity. Green peppercorns and gentle carbonation add further character and depth to the drink. Apricot defines the profile—not in an overpowering way, but as a warm, floral foundation that supports the jasmine and anchors the tarragon. Sea buckthorn contributes a delicate acidity that ties everything together. On the palate, PROXY D is bright and effervescent—almost as light as a fine aperitif—yet possesses enough depth to warrant refilling the glass. It pairs beautifully with light appetizers, raw vegetables and dip, or goat cheese, and makes an excellent aperitif to enjoy in the sunshine. Serve in a wide wine glass with a single ice cube. Those who enjoy PROXY D will likely also appreciate the still PROXY B, which follows a similar stylistic path with quince and walnut.

The 750ml Proxy flavors list for $21.

Production

From Open to Closed Fermentation – The Evolution of Bouche

Through continuous experimentation, precise adjustments, and countless test batches, Bouche developed a modern brewing method. Like many kombucha brewers, they began with open fermentation – small containers filled with black and green tea, beet sugar, and a SCOBY covered with a cloth. While results were good, they noticed something: each batch tasted a little different. Ambient temperature and environmental factors caused fluctuations, making consistency difficult to achieve.

They developed a new process – the closed fermentation method, without a physical SCOBY. The closed fermentation process creates a consistent, controlled environment where oxygen, temperature, and fermentation time can be precisely adjusted. The jacket regulates temperature to speed up or slow down the process depending on the batch. Instead of using a SCOBY, fermentation is guided by their liquid starter culture – a living ecosystem of yeast and bacteria they developed in-house. This innovation lies at the heart of the Bouche process, ensuring every batch carries the same depth, liveliness, and balance that defines their kombucha.

Starter Culture & Flavoring

The starter culture, just like the base kombucha, is made from black and green tea and regional beet sugar from Germany. It’s kombucha in concentrated form, triggering fermentation and shaping the drink’s flavor structure through controlled levels of acidity. A high concentration of living microorganisms results in the beverage’s characteristic brightness.

Their pursuit of complex flavors eventually led to a merger of traditional fermentation methods with modern brewing precision. The result is a unique flavoring process – a technique inspired by the concept of dry hopping in brewing. Similar to maceration, this process allows the extraction of tannins, bitters, and natural aromatic compounds directly from botanicals.

The beverage is flavored without relying on juices, syrups, or concentrates — resulting in a kombucha that’s less sweet than soda, yet far more complex in taste. The ingredient palette spans hop varieties (for hop-infused kombucha), bergamot (for kombucha with bergamot), woods, and occasionally fruits. Their soluble compounds — pigments, tannins, essential oils, and aromas — infuse into the ferment, creating depth, color, and natural vibrancy.

The result: by using closed fermentation, they can precisely control every aspect of the process — temperature, oxygen exposure, and fermentation speed — without sacrificing the complexity that defines kombucha as a living drink.

Bouche is heat-treated after filling and the yeasts removed with a centrifuge. Unlike the de-alcoholizing Flavourtech spinning cone columns used by Aqua ViTea and Brew Dr this is not to remove ethanol, which they have controlled in the closed fermentation process.

The centrifuge that we use is for gentle separation. It’s like a filter. But with a centrifuge, it’s not as harsh as a filter, and you can fine-tune it more. By doing that, you can make sure that when you run it through a flash pasteurizer, you don’t burn anything with higher density; you’re going to burn the flavors. In this way, you can get a very clean, rounded flavor.

Bouche does not require refrigerated transport and has a stable shelf life that works at stockists without chilled displays, which are less common in European markets than in the States.

Distribution

Bouche is available online. Shipping is free on orders above €70.

Those who prefer to buy Bouche without waiting for delivery can find the nearest stockist via the Store Locator. All bricks-and-mortar retailers across the EU carrying Bouche are listed there — from selected delicatessens to organic food shops with a serious drinks program.

A growing number of restaurants, cafés, and bars carry Bouche on their drinks menu — as a standalone option alongside wine and other alcohol-free drinks, not as an afterthought.

Hospitality partners are also listed via the Store Locator.

Podcast

Tune in to the podcast to hear Walker tell the Bouche story.

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