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After using bottled water, it is best to use it within one week
Experts from the Department of Product Quality Supervision under the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China have reminded consumers that once bottled water is opened, it should be consumed within a short time frame. It is generally recommended to use it within a week, and if not consumed in that period, it should be boiled before drinking to ensure safety.
They also pointed out that even high-quality barrelled drinking water can become contaminated with bacteria after delivery, especially during hot summer months when bacterial growth accelerates. To prevent this, it's best to store bottled mineral water in a cool, dark place away from direct sunlight. Consumers should also be cautious about secondary pollution from public water dispensers and ensure they are regularly cleaned. Water dispensers should be maintained and cleaned by the factory on a scheduled basis.
In addition, experts advised consumers to pay attention to the quality of the packaging when purchasing bottled water. High-quality bottles or barrels should be clear, hard, and made of PC material, which offers high transparency and a smooth surface. Unfortunately, some manufacturers still use recycled plastic materials, often referred to as "black barrels," which are dark and less transparent. These are not only unhygienic but also banned in many regions due to health concerns. Consumers should carefully inspect the packaging and avoid such products.
The bucket cover should be bright, clean, and firm. When turning the bottle upside down, there should be no leakage. Also, when removing the bottle from the dispenser, the inner plug should fit snugly to prevent contamination. Qualified drinking water should be completely clear, odorless, and free of any visible particles. If the water appears yellow, cloudy, has floating particles, or has an unusual smell, it should not be consumed. Always check for signs of contamination before drinking.