2nd fermentation lid | F2 lid

The 2nd fermentation lid, the perfect way to achieve your 2nd fermentation.

What is 2nd fermentation?

When making your natural soda, the second fermentation is the process where already fermented water kefir, ginger beer, milk kefir, jun, or kombucha continues to ferment for a short period, usually 24-48 hours, in a sealed pressure-resistant bottle at room temperature.

During the second fermentation, the bacteria and yeast in the grains continue to metabolize the remaining sugar in the liquid, resulting in a lower sugar content and a more complex, tangy flavor. The sealed bottle traps the carbon dioxide produced during fermentation, giving the final product natural carbonation and a fizzy texture.

Benefits of a 2nd fermentation

• Less sugar: the yeasts eat part of the remaining sugar, so the drink turns drier.
• Enhanced flavor: a longer fermentation provides a deeper and more tangy taste.
• More aroma: add fruit, herbs or ginger to the bottle for the second fermentation and those flavours carry into the drink.
• Fizzy, happy bubbles: the natural carbonation created during the second fermentation cannot escape through the sealed lid. This creates bubbles in your kefir, ginger beer, jun, or kombucha.

About this 2nd fermentation lid

The 2nd fermentation lid is a tight-sealing lid that you can screw onto your Kefirko water kefir or milk kefir jar instead of the standard lid, allowing you to achieve a second fermentation, also known as F2.

• Drinking spout – Open the top cover to pour or drink kefir directly from the jar.
• Fermentation clock – Set the day of the month you start the second fermentation. Track progress, prevent over-fermentation, and achieve consistent results every time.
• Your constant travel companion – Thanks to the airtight seal, you can take Kefirko with you on your travels and never miss your daily dose of kefir.
• Storage – Not in the mood for your homemade soda right now? Store it in the Kefirko jar with the lid on.
• Durable materials – Only food-safe and BPA-free plastic materials are used for the lid.

Online on-demand workshop ‘make your own kombucha’

During our online on-demand workshop, food writer and fermentation expert Meneer Wateetons teaches you how to make kombucha. This masterclass will show that making kombucha isn’t difficult and doesn’t require any special equipment or conditions. Easy peasy! Click here for more info.