Shipping fermented food: why stable temperature matters more than maximum cold
Most food in a shipping box is meant to stay as unchanged as possible until it is opened. Fermented food keeps working. Kimchi, sauerkraut, kombucha, miso and many other ferments contain live cultures that remain active after the jar is closed. That brings its own requirements for shipping.
Warmth speeds up fermentation
The warmer it gets, the more active the cultures become. On a warm route, a product can produce more gas, become more acidic and taste different from what the producer intended. What was perfect in the producer's cold room then reaches the customer with a different flavour profile.
Gas needs space
Where fermentation happens, gas is produced, and pressure builds up in jars, bottles and pouches. On a warm route this can lead to domed lids, swollen pouches or leaking liquid. For end customers, a parcel like that looks like a quality problem when it is opened, even if the product itself may still be fine.
Too cold is not always right either
The obvious reaction would be to cool as much as possible. For many ferments that is not ideal. Frost can change the texture, for example in fermented vegetables, and some producers want the cultures to arrive active. What matters is a stable temperature over the whole route, rather than a box that starts very cold and warms up quickly.
What this means for packaging
For fermented products, three things matter most:
Even insulation that buffers temperature fluctuations over the entire transit time.
The right number and position of cooling elements, so the product arrives chilled but not frozen.
Enough support in the box, so jars and bottles stay secure under pressure and movement.
The right combination depends on the product, the container size and the route. That is why we test the setup with our customers' products in our hall in Hartberg before the first delivery goes out.
Consistent after unpacking too
Many fermented products are bought by people who care about origin and production. Our insulated packaging is made from more than 97% recycled paper and is fully recyclable in the standard paper bin without separation, which fits what is inside the jar.
Do you ship fermented food and want to know which setup suits your product? Talk to us: https://www.supaso.eu/kontakt