Fermentation Starters & Tools

Grow your own refreshing, fizzy probiotic drink at home with our organic water kefir grains.

We use only certified organic ingredients and filtered spring water to cultivate healthy, active grains.

Water kefir is a reusable, perpetual culture that can be used again and again to brew naturally sparkling drinks that support digestive health.

Choose from:

• 3 Tbsp fresh water kefir grains
• 1 Tbsp dried water kefir grains

Each portion makes approximately 1 litre of probiotic water kefir every 24-48 hours.

Includes our comprehensive Water Kefir eGuide packed with instructions, tips, and recipe inspiration.

For best results, we recommend feeding your grains with our Water Kefir Complete Food.

Fresh water kefir grains are shipped every Monday (or Tuesday following a public holiday). Orders must be placed and paid for by 4 pm Saturday for shipment the following week.

Certified organic water kefir food containing sugar, molasses and micronutrients to feed your water kefir grains optimally. This pack contains the food for water kefir grains only, you need to have your own grains or buy them from us.

This way they stay healthy and produce a better probiotic fizzy drink for you and your family.


Available in 100g, 500g and 1kg bulk pack in a home-compostable, biodegradable pouch.


Containing only certified organic ingredients so that your water kefir grains can thrive (do not come with the grains). Without any roundup or other agricultural chemical residues, which could have a negative effect on the microbes in the water kefir.

This guide covers all the essentials you need to create delicious, probiotic, and naturally fizzy water kefir sodas at home. Learn how to successfully make both the first and second ferment, along with flavouring ideas, recipes, and helpful tips for creating delicious homemade kefir sodas.

Perfect for beginners and experienced fermenters alike.

Available as:

• Downloadable PDF
• Printed booklet (A5, with shipping cost)

Please choose your preferred format below.

If purchasing our KoruKai  Water Kefir Grains or our Water Kefir Kit this Guide as pdf is included with your purchase.

This Yoghurt Maker from Culture Cupboard is great for making homemade yoghurt - without the need for an electric yoghurt maker. It also helps maintain a steady fermentation temperature year-round, protecting kefir and cultures from cold winter nights and fluctuating summer heat.

The insulated flask includes a glass jar and recipe booklet with instructions for both dairy and dairy-free yoghurts, making it an easy and energy-efficient tool for home fermentation.

Instant-read stainless steel dairy thermometer for kefir, yoghurt, and cheese making. No batteries required, simply place it in milk for accurate, real-time temperature readings.

Designed by KoruKai Herb Farm, drawing on over a decade of hands-on experience in cheesemaking and dairy fermentation, it reflects practical, real-world needs in a working kitchen.

13.5 cm long with clip for easy pot or jar attachment.

Billions of live probiotics in every tablespoon.

One portion of organic milk kefir grains cultures approximately 1 cup of milk every 24 hours and can multiply to culture up to 1 litre within two weeks under good conditions. Available in hydrated or dehydrated form (please select below).

Easy to use and endlessly reusable, milk kefir grains allow you to make fresh, probiotic-rich kefir.

Shipping Information

NZ-wide shipping available to urban and rural addresses, including PO Boxes.

Fresh milk kefir grains are shipped every Monday (or Tuesday if Monday is a public holiday). Orders and payment must be received by 4pm Saturday for dispatch the following Monday.

This guide covers everything you need to know to make probiotic-rich milk kefir using milk kefir grains. With over 15 years of experience, we share proven methods to help your grains thrive so you can enjoy healthy kefir for life.

Available as:

• Downloadable PDF
• Printed booklet (A5, with shipping cost)

Please choose your preferred format below.

If purchasing our KoruKai Milk Kefir Grains or our Milk Kefir Kit this Guide is included with your purchase.

Billions of probiotics per tablespoon for gut health.

Everything you need to start making delicious, probiotic-rich milk kefir at home.

This beginner-friendly Milk Kefir Making Kit includes organic milk kefir grains, a wide-mouth glass jar, stainless steel strainer, dairy thermometer, and our comprehensive Milk Kefir eGuide with step-by-step instructions.

A simple and affordable way to make fresh kefir again and again from your own kitchen.

An additional glass jar for keeping ready kefir milk in the fridge can be purchased here: 500ml glass jar.

Shipment of fresh milk kefir grains every Monday (or Tuesday if Monday is a public holiday). Orders and payments need to be in by 4pm Saturday to get shipped the following Monday.

Stainless steel fine-mesh strainer designed for separating milk and water kefir grains from finished kefir. Durable, easy to clean, and ideal for everyday fermentation use.

10 cm diameter compact round sieve with fine wire mesh—also suitable for general kitchen straining, sifting flour, or draining small foods.

A must-have for cheesemaking and dairy fermentation.

This high-quality cheesecloth is made from certified organic cotton and is ideal for straining curds, making kefir cheese, yoghurt cheese, labneh, soft cheeses, and other cultured dairy products.

Reusable, washable, and free from synthetic fibres, it provides excellent drainage while remaining gentle on delicate curds.

Size: 1.5m × 1m

Preserving jar with stainless steel compound lid for preserving, fermentation, vinegar making and much more.

Capacity: 1000ml

Size: 17cm high

Mouth size: 7.6cm wide mouth

500ml food screwtop jar and white foodseal cap used for our milk kefir kit.

Capacity: 500ml

Diameter: 9.9cm

Height: 10cm

Cap size: 9.2cm