Why soya sauce bottle bloated?

- Spoilage: If the soy sauce bottle is not properly sealed or stored in a cool, dark place, it can become spoiled by bacteria or yeast, which can produce gas and cause the bottle to bloat. This is why it's important to always store soy sauce bottles in the refrigerator after opening.

- Temperature changes: Soy sauce is made from soybeans, wheat, and salt, which are all hygroscopic materials that can absorb moisture from the air. If the soy sauce bottle is exposed to significant temperature fluctuations, it can cause the soy sauce to expand and contract, which can put pressure on the bottle and cause it to bloat. To avoid this, it's best to store soy sauce bottles at a consistent temperature.

- Over-fermentation: Soy sauce is a fermented product, and if it is over-fermented, it can produce excessive amounts of gas that can cause the bottle to bloat. To avoid this, it's important to follow the manufacturer's instructions for storage and handling.

- Defective bottle: In some cases, a soy sauce bottle may be defective, such as having a weak spot or a crack that allows air to enter the bottle. This can cause the soy sauce to spoil or become over-fermented, leading to bloating. If you notice a bloated soy sauce bottle, it's best to discard it and purchase a new bottle.

- Chemical reactions: If soy sauce is exposed to certain chemicals, it can react and produce gas that can cause the bottle to bloat. For example, if soy sauce is left in a metal container, it can react with the metal and produce hydrogen gas, which can cause the bottle to bloat.