A Hong Kong woman’s disturbing discovery of worm-like mould floating inside a freshly opened bottle of steamed fish soy sauce has sparked a citywide conversation about proper condiment storage. The incident, which went viral on social media, prompted the brand’s official公关 team to issue a rare public response, revealing that countless households are unknowingly storing the sauce incorrectly, leading to premature spoilage.
The Shocking Discovery
The woman, who had used the soy sauce to season a steamed fish dinner, noticed white, worm-shaped mould colonies floating inside the bottle only after the meal was finished. Horrified, she posted a photo on social media asking whether the fish she had just eaten was still safe. The post quickly attracted hundreds of responses, with many users sharing eerily similar encounters.
“I used the bottle for just two weeks and it already had mould,” one commenter wrote. Another recalled finding a large clump of mould at the bottom of an empty bottle, joking, “I thought it was a dried abalone the whole time.”
Brand’s Official Response: Preservative-Free Formula Is a Double-Edged Sword
In an unusual move, the brand’s official social media team directly addressed the incident. The company explained that their steamed fish soy sauce is manufactured without added preservatives, a choice that enhances natural flavour but makes the product more vulnerable to environmental contamination after opening.
The brand’s key recommendation: All opened bottles must be immediately stored in a refrigerator at 0–4°C. This step stabilises the sauce’s quality and significantly reduces the risk of mould growth. The company emphasised that failure to refrigerate is the single most common mistake households make.
The swift and transparent response earned widespread praise, with netizens calling it a “textbook PR move.” However, it also left many Hong Kongers stunned. “Soy sauce needs to go in the fridge? I’ve kept it in the cupboard my whole life,” one user confessed.
Three Essential Storage Steps to Prevent Mould
The brand outlined a simple three-step protocol to keep soy sauce fresh:
- Wipe the bottle neck thoroughly after each use, then screw the cap on tightly to minimise air and moisture entry.
- Store opened bottles in the refrigerator at 0–4°C to maintain stable quality.
- Keep the bottle away from the stove and other sources of steam and heat.
Consumer Council Weighs In: Which Condiments Must Be Refrigerated?
The incident has reignited interest in proper condiment storage guidelines. Hong Kong’s Consumer Council has previously advised that during hot and humid months, any soy sauce not used daily should be refrigerated. Beyond soy sauce, several other pantry staples require cold storage after opening:
Must be refrigerated:
- Fermented and high-moisture sauces such as black bean paste, shrimp paste, fish sauce, oyster sauce, and char siu sauce – refrigeration slows fermentation and prevents discoloration and mould.
- Composite sauces containing spices, peanuts, dairy, eggs, or fruit – these ingredients are highly susceptible to spoilage.
Should NOT be refrigerated:
- Dry powdered seasonings including pepper, five-spice powder, salt, sugar, chicken powder, and cornstarch – the temperature difference can cause condensation, leading to clumping. Store these in airtight containers in a cool, dry place.
What This Means for Hong Kong Households
The viral case serves as an urgent reminder that even everyday staples require careful handling. Many consumers admitted they had never read the storage instructions printed on the bottle labels. The brand’s proactive response has not only clarified the correct storage method but also highlighted the importance of food safety awareness in the home kitchen.
For those who have already consumed potentially contaminated sauce, medical experts advise monitoring for any gastrointestinal symptoms, though the risk is generally low. Moving forward, the simplest takeaway is this: when in doubt, refrigerate. A few seconds of proper storage could save both a perfectly steamed fish and your peace of mind.
For more guidance on food storage, refer to the Hong Kong Consumer Council’s latest condiment storage guidelines or consult the product label on your next bottle of soy sauce.