The notion that you should not use water bottles are the result of paranoia and a variety of e-mail chain letters and hoaxes, although there are some concerns related to multiple-use plastic bottles containing compound Bisphenol A. The many claims about the inherent dangers of disposable bottles, however, are based on unconfirmed scientific studies that have not yet undergone peer review
Known as PET or PETE, the polyethylene terephthalate polymer resin used in water, soda and juice bottles that have been the subject of much controversy. Meant to be single-use bottles, many people tend to reuse and wash them to keep drinking.
According to Snopes, the popular urban legend reference side, greater requirements referenced in chain e-mail is that freezing or re-use bottles containing PETE releases dioxins in the liquid. This was refuted by Dr. Rolf Halden, who claimed that dioxins are not found in plastic, and that freezing the bottles actually works against the release of chemicals.
Bisphenol A is an organic compound used in hard plastic containers intended for multiple reuse, such as baby bottles and water bottles used by cyclists. In 2007 a panel of the National Institutes of Health claimed exposure to chemical of children traveling “some concern.” This has led to the possibility of a ban on products containing bisphenol A products for children under 6 years.
Bisphenol A is more serious concern than polyethylene terephthalate, which it has been linked to cancer and reproductive damage in some animals.