The first thing to do when buying bottled water is to prevent counterfeiting. Some manufacturers sell "pure water" everywhere without factories and equipment that meet hygiene standards. Some water from other factories is packed in barrels marked with our factory logo, some are bottled in inferior plastic bottles, and some are simply packed in tap water. They lured consumers into being cheated by using low prices as bait. According to the disclosure of relevant departments, the microorganisms in these waters seriously exceed the standard, and the pollution is serious, and the drinkers are very likely to cause diseases. Therefore, consumers should buy brands and water stations with good brand reputation and stable quality. The second depends on the water quality. Qualified pure water, the water quality should be clear and transparent, and the taste should be free of peculiar smell and astringency. If there is suspended matter or turbidity in the water, it is unqualified so-called pure water and cannot be drunk. The third is to observe the bucket. The bottom of the regular bucket is marked with the manufacturer, production date, certificate of approval, anti-counterfeiting query mark and QS certification, mostly light blue or colorless, made of PET and PC. Qualified buckets are highly transparent, bright, tasteless and seamless, and the bottom of the bucket has a registered trademark. The unqualified plastic bucket is gray in color, with poor transparency, impurities or crystal spots, no trademark and insufficient impact strength. Unqualified plastic buckets filled with water are not only easy to be damaged, but also have an impact on water quality and should be rejected. The fourth is to look at the outer packaging. Barreled pure water produced by regular manufacturers has a trademark on the barrel and complete labels. The plastic packaging bag used outside the barrel is firm in texture and the printed trademark is more detailed.