Metal Water Bottles Pose Food Poisoning Risk With Sports Drinks, Japan Warns

Consuming sports drinks stored in metal containers with internal damage could lead to food poisoning, Japanese health authorities have warned. The Ministry of Health, Labour and Welfare cautioned that even if a water bottle appears intact after an impact, its inner lining may be compromised, potentially causing metal components to dissolve into acidic beverages.

This risk is particularly relevant during hot summer months when increased hydration is necessary. A case reported by the Tokyo Metropolitan Government involved six individuals who experienced headaches and dizziness after drinking sports beverages stored for about six and a half hours in a damaged water bottle.

Containers made of aluminum, copper, or iron typically have protective coatings. However, rust or scratches can expose the metal, allowing it to seep into acidic drinks like sports beverages, lactic acid drinks, or juices rich in Vitamin C or citric acid. Excessive copper intake can cause physical discomfort.

To mitigate this risk, authorities advise against storing acidic drinks in these containers for extended periods. It is also recommended to replace old water bottles periodically and to thoroughly inspect the interior of bottles, especially after any accidental drops or impacts, to ensure there is no hidden damage.