It is unhealthy To Reuse A Plastic Water Bottles
If the water starts to taste like plastic,throw it out. If you can taste the plastic, the level of chemicals is too high. Bottles that are pre-filled with water are not meant to be reused and their plastic will break down even more rapidly than will sports or camping bottles that are made as reusable containers. The plastic breaks down and releases vinyl chloride into the water, which causes cancer. The vinyl chloride imitates the female hormone, estrogen, and keeps your body from producing its own estrogen. Vinyl chloride, in large amounts, can not only act like pseudo-estrogens, it can mutate your DNA.

Do not purchase water, milk or flavored drinks in soft plastic bottles
The flavord water or milk will disguise the plastic tastes. Use glass or the hard polycarbonate bottles. They will not transfer the taste or smell of plastic to your beverage. Do not let any plastic bottle bake out in the sun.

Chemical companies are keeping cancer dangers secret
The European and American chemical companies have drafted a secrecy agreement stating, "the members of our task group as listed on the attached sheet, are the only ones entitled to receive information about the European project." In the US, Dow Chemical ordered that no one discuss the European work. Protecting industry from suits by users of vinyl chloride products and avoiding financial loss if consumers stopped buying their goods was foremost for industry.

In 1973, the US Food and Drug Administration (FDA) learned that plastic liquor and wine bottles were leaching vinyl chloride into the liquor and wine, and ultimately banned its use for liquor bottles. An industry study found that vinyl chloride residues from bottles and packages had migrated into vinegar, apple cider, vegetable oil, mineral oil and meats.

That same year, the National Institute for Occupational Safety and Health (NIOSH) published a Request for Information on the potential hazards of vinyl chloride. To maintain its relationship with the government agencies, the industry would need to give NIOSH information about Maltoni’s research. As Dow’s vice president said, It would be extremely damaging to the chemical industry’s reputation if someone should discover that we have this information and have not disclosed it to the Government

On the other hand, the US chemical industry had signed the secrecy agreement with its European counterparts. The MCA devised a plan that would maintain the secrecy agreement while making it appear that the industry was responding to NIOSH’s request for information. MCA lawyers told the trade group’s representatives they shouldn’t volunteer information on the European projects, but if asked a direct question, they could respond truthfully. This was not expected because NIOSH did not know of the European experiments. Further, the companies would not volunteer information on hazards to consumers, since NIOSH was concerned with employee health, not public health.

At the meeting, no mention was made of Maltoni or of kidney and liver cancers. According to notes taken by the NIOSH representative, although the industry told of Viola finding cancers at 30,000 ppm, no one mentioned tumors at 250 ppm.

Studies in the mid-1970s showed workers exposed to vinyl chloride suffered an excessive number of cancer deaths from cancer of the liver, lung, lymphatic and central nervous systems, including brain tumors. However, VCM is also a potential danger to consumers. After polyvinyl chloride is produced, vinyl chloride gas is trapped in the finished product and can escape. When burned, PVC produces hazardous fumes. Other studies in 1974-75 documented that vinyl chloride may be mutagenic (producing genetic mutations, a cause of birth defects) as well as carcinogenic.