Water kefir is the unsung craft mixer. Faster than kombucha, cleaner than ginger bug, more delicate than commercial tonic. The grains are gelatinous translucent clumps of yeast and bacteria that ferment sugar water into a lightly carbonated, slightly sweet, mildly alcoholic drink (typically 0.5-1.5% ABV). Once you have a culture, you have an unlimited supply of house mixer.

What water kefir actually is

Water kefir grains (also called tibicos, tibi, Japanese water crystals) are a symbiotic culture of bacteria and yeast (a SCOBY, in the same conceptual family as kombucha but in a different organism cluster). The grains look like small translucent gelatinous crystals, 2-5mm across.

Place grains in sugar water, leave at room temperature 24-48 hours, the grains eat the sugar and produce CO2, lactic acid, and trace alcohol. Strain out the grains, drink the liquid. Add fresh sugar water to the grains, repeat indefinitely.

Water kefir originated in Mexico (where it is called tibicos) and spread globally through fermentation enthusiasts in the 20th century.

Where to get grains

You cannot buy these in a supermarket. Sources in Malaysia:

  • Health food shops (BIG Pharmacy occasionally, Country Farm Organics)
  • Local fermenters on Facebook groups (Klang Valley Fermenters, Healthy Living Malaysia)
  • Online sellers via Carousell or Shopee
  • Friends who brew (most kefir brewers have excess grains and give them away)

Expect to pay RM 30-60 for an initial culture of 3-4 tablespoons of grains. They double in volume every 1-2 weeks under normal brewing.

The basic recipe

For a 1-litre batch:

  • Filtered or spring water (chlorine kills the grains) 1L
  • Cane sugar (unrefined is better, brown sugar works) 60g
  • Water kefir grains 3 tablespoons
  • Optional: 1 dried fig or 2 raisins (mineral content feeds the grains)
  • Optional: 1/4 lemon, sliced (helps balance pH)

Combine in a glass jar. Cover loosely (cloth or loose lid). Leave at room temperature 24-48 hours. Strain out the grains with a plastic sieve (metal can damage them).

The strained liquid is your water kefir. Drink immediately or bottle for second fermentation.

Second fermentation for carbonation

Same principle as F2 kombucha: bottle the strained water kefir with a flavour addition + a touch of sugar, seal, let pressure build for 1-2 days, refrigerate.

Flavour additions that work: fresh fruit (mango, pineapple, strawberry), fresh juice (50ml per litre), citrus zest, fresh herbs (mint, basil, lemon balm), spices (cardamom, cinnamon).

Three cocktails where water kefir works

1. Water Kefir G&T. Gin 50ml, F2 water kefir (lemon-cucumber flavour) 100ml, ice, cucumber slice. The kefir's gentle acidity replaces both the tonic water and the citrus.

2. Kefir Penicillin. Scotch 45ml, fresh lemon 15ml, honey syrup 10ml, ginger-flavoured water kefir 90ml as top instead of soda, peated whisky float. Brighter than the original, less bitter.

3. Tropical Highball. White rum 45ml, pineapple-pandan F2 kefir 90ml, lime wedge. Closest a non-alcoholic-adjacent drink gets to a proper tropical cocktail.

Why bother over kombucha?

Water kefir is cleaner-tasting than kombucha. Less vinegar, more like a craft soda. It also ferments faster (24-48 hours vs 7-10 days for kombucha), and the grains are easier to manage than a SCOBY (no slimy disc, no surface mould risk).

For a bar running through 5-10 litres of mixers a week, water kefir is the workhorse craft mixer. For complex flavoured ferments, kombucha gives more depth.

Related reading

Frequently asked questions

What is water kefir?

Water kefir (also called tibicos or Japanese water crystals) is a symbiotic culture of bacteria and yeast formed into small translucent gelatinous grains, 2 to 5mm across. Placed in sugar water, the grains ferment for 24 to 48 hours producing CO2, lactic acid, and trace alcohol (0.5 to 1.5% ABV). The result is a lightly carbonated, mildly sweet drink that originated in Mexico.

How do I brew water kefir at home?

For a 1-litre batch: 1L filtered water (chlorine kills the grains), 60g cane sugar, 3 tablespoons of grains, optional dried fig or two raisins for minerals and a slice of lemon for pH. Combine in a glass jar, cover loosely with cloth, leave at room temperature 24 to 48 hours. Strain with a plastic sieve (metal can damage the grains). Drink immediately or bottle for second fermentation.

What's the difference between water kefir and kombucha?

Water kefir is cleaner-tasting (less vinegar, more like craft soda) and ferments faster (24 to 48 hours vs 7 to 10 days for kombucha). The grains are easier to manage than a SCOBY: no slimy disc, no surface-mould risk. Water kefir is the bar workhorse for high-volume mixing; kombucha is better for complex flavoured ferments with more depth and a bigger acid backbone.

Can water kefir replace tonic water in a G&T?

Yes, and the swap shifts the drink's character. Use 100ml of F2 lemon-cucumber water kefir over 50ml gin with ice and a cucumber slice. The kefir's gentle acidity replaces both the tonic and the citrus. The drink reads softer, more delicate, and slightly probiotic where the tonic version reads bittersweet and bright. Better with citrus-forward gins than with classic London Dry.

Where can I get water kefir grains in Malaysia?

You cannot buy them in a supermarket. Try BIG Pharmacy or Country Farm Organics; local fermenters on Facebook groups (Klang Valley Fermenters, Healthy Living Malaysia); Carousell or Shopee sellers; or friends who brew (most kefir brewers have excess and give them away). An initial culture of 3 to 4 tablespoons runs RM 30 to 60. To try kefir cocktails first, ask at Dissolved Solids or Soluble Solids.