The kombucha and water kefir duo: one order, two kinds of fizz
In short
The Natural Probio duo brings together a live kombucha SCOBY with its starter liquid and 30 g of live water kefir grains. You brew two quite different sparkling drinks: a tea-based kombucha with depth, ready in a good week, and a fruity water kefir, ready the next day. Two guides come with it, and both cultures are covered by the Natural Probio guarantee.
- In the parcel
- SCOBY and water kefir 30 g
- Drinks
- Two sparkling drinks
- Guides
- Two included
- Guarantee
- Lifetime, on activity
It happens all the time: someone orders a SCOBY, falls for homemade kombucha, and a month later wonders what water kefir tastes like. Or the other way round. The duo simply saves you the second order. If both drinks appeal, start them together, with one parcel and one delivery.
What is inside the duo?
- A live kombucha SCOBY with its starter liquidThe living kombucha culture, sealed in its pouch, ready for your first jar of sweet tea.
- Live water kefir grains, 30 gIn their own liquid, enough for about a litre of fruity, sparkling drink a day.
- Two step-by-step guidesOne for each drink, with the first steps and the signs that everything is going well.
- Exclusive recipesThe booklet's QR code opens our recipe and flavour library for both drinks.
- The Natural Probio guaranteeLifetime guarantee on the activity of both cultures, and money back if you are not satisfied.
How different are the two drinks?
Different enough that they rarely compete for the same moment. Kombucha is the one you pour when you want something with backbone: tea, a pleasant tartness, firm bubbles. Water kefir is lighter and more playful, closer to a homemade lemonade, and it takes on fruit flavours beautifully.
| Drink | The taste | Ready in | Best moment |
|---|---|---|---|
| Kombucha | Sparkling tea, tangy, rounded | A good week | Aperitif, with food, for tea lovers |
| Water kefir | Fruity, bright, like a homemade lemonade | The next day | Everyday drinking, lunch, a hot afternoon |
For a fuller comparison, see kombucha vs water kefir.
What does a typical week look like?
On Sunday, you start a jar of kombucha: a few minutes to make sweet tea, add the SCOBY with its liquid, cover and leave it. Meanwhile, the water kefir runs on a daily loop. Each morning or evening, you strain yesterday's jar, bottle it with a slice of lemon or a handful of berries, and start a new one. That takes about five minutes.
By the following weekend, your kombucha is ready to taste and bottle, and the fridge holds three or four bottles of water kefir in different flavours. Customers often tell us the duo takes barely more time than one drink alone, because the two rhythms slot into each other so neatly.
Who is the duo for?
- The curious who want to discover both of the great homemade sparkling drinks without having to pick one.
- Couples and house-shares where one prefers fruit and the other prefers tea.
- Keen hosts who like to offer two homemade drinks when people come round.
- Gift givers looking for something original: the duo is one of our most popular presents. See gift ideas.
Want every culture in the range, including creamy milk kefir? The complete kit brings all three together.
What do duo customers say?
"I recently purchased the culture kits for both water kefir and kombucha, and I couldn't be happier! […] Both cultures worked perfectly on the very first try, and the drinks taste absolutely delicious."
Elisa, June 2026Trustpilot review"I ordered kombucha SCOBY and water kefir grains and when the package arrived, a part of the kefir was missing. Client service was very quick at sending me the missing item. Both grains and SCOBY are producing great drinks."
Juliette M., June 2026Trustpilot reviewQuestions about the duo
Can I start both drinks on the same day?
Yes. Both cultures can begin on arrival, each with its own guide. If you prefer a gentler start, begin the water kefir first and keep the SCOBY in the fridge for a few days, as the guide explains.
Do I need a lot of space?
One jar for the kombucha, one for the water kefir and a few bottles in the fridge. A corner of the worktop is plenty.
Are both cultures guaranteed?
Yes. The SCOBY and the grains are guaranteed alive on arrival, and their activity carries a lifetime guarantee in normal conditions of use: otherwise we replace them at no cost.
Is the duo sent to the UK?
Yes, like the whole range. It leaves within 24 to 48 working hours with tracking, and the delivery time and cost for your address are shown at checkout. UK delivery and guarantee.
The kombucha and water kefir duo
Two live cultures, two guides, two homemade sparkling drinks: the easy way to keep the fridge interesting.
- Kombucha SCOBY with its liquid and water kefir grains 30 g
- Two step-by-step guides and exclusive recipes
- Dispatched within 24 to 48 h, tracked
- Lifetime guarantee on both cultures
Lifetime guarantee on your culture's activityDelivery across the UK, with trackingMoney-back guaranteeSCOBY from time-honoured methods, unique and resilient
