Kvass has a one-of-a-kind flavor that’s both familiar and surprising. Imagine the smooth sweetness of cola, but with a natural twist. Each sip carries gentle notes of toasted rye bread, a hint of honey, dried fruits, and a touch of warm vanilla.

It’s lightly sparkling, perfectly balanced between sweet and tangy, and refreshingly smooth.

Kvass is crafted the traditional way through natural fermentation of hearty rye bread, which gives it its signature malty, slightly rich flavor. It all begins with bread baked and toasted to bring out its deep, rich flavor. The bread is then soaked in hot water to create a rich, aromatic base, blended with natural yeast and a little sugar, and left to ferment slowly. Just as it’s been done for centuries.

During this gentle fermentation, the magic happens: the drink develops its natural fizz, refreshing tang, and signature aroma. Once perfectly balanced, it’s chilled and ready to enjoy: crisp, lightly sparkling, and full of natural goodness.

Kvass is a delicious way to enjoy the benefits of fermented foods. What makes Kolo truly special is the fermentation and breving technology. During fermentation, naturally occurring live and active cultures develop, helping to support healthy gut flora and aid digestion.

It has a unique taste. Naturally fermented. Subtly sparkling. Unapologetically bread-based.

Yes! Our kvass is naturally probiotic thanks to the gentle fermentation process that brings it to life. During fermentation, beneficial cultures develop — the same kind of friendly bacteria that support a healthy gut and overall well-being.

The result is a refreshing drink that not only tastes amazing but also helps you feel your best. Kvass proves that tradition and wellness can go hand in hand, naturally.

Fermentation needs three simple ingredients: toasted bread, yeast, and just a sprinkle of sugar. The sugar feeds the yeast, helping it grow and create that naturally fizzy, flavorful kvass.

Our kvass contains only 4.9 grams of sugar per can, which is about half the sugar found in Coca cola. And you’ll never find artificial sweeteners in our kvass — just pure, natural goodness in every sip.

No, our kvass is completely caffeine-free. Its natural fizz and refreshing taste come purely from the fermentation process, not from added stimulants.

That means you can enjoy kvass any time of day, morning, afternoon, or evening, and still feel refreshed and balanced.

All fermentation naturally produces a small amount of alcohol. We use a gentle process to remove it while keeping all the live and active cultures intact. This makes our kvass safe for everyone to enjoy, and it’s no wonder kids love it too, naturally bubbly, pleasantly sweet, and full of flavor.

Yes, please! Kvass tastes its best when chilled. You don’t need to keep your Kolo in the fridge all the time, but be sure to pop it in before serving for that perfectly refreshing, crisp flavor.

People have been enjoying kvass for more than a thousand years. This beloved drink dates back to ancient Eastern Europe, where it was made as a refreshing daily staple. Over the centuries, it became a symbol of hospitality, comfort, and simple natural goodness.

Today, we continue that time-honored tradition, crafting kvass with the same care and authentic fermentation that people have loved for generations. It is history in a can, ready to be rediscovered.

Our kvass comes in perfectly sized 330ml cans, just the right amount for a refreshing moment anytime, anywhere. Whether you’re stocking up for a cozy weekend or sharing with friends, you can choose between our 6-pack or 12-pack options.

Currently we only ship to the UK, Isle of Man & Channel Islands.