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The following plastic water bottles should be avoided according to  http://www.thegreenguide.com/doc/101/plastic

Also, to learn more about bisphenol-A, visit http://www.bisphenol-a.org/whatsNew/20080205.html

Plastics to Avoid

#3 Polyvinyl Chloride (PVC) commonly contains di-2-ehtylhexyl phthalate (DEHP), an endocrine disruptor and probable human carcinogen, as a softener.

#6 Polystyrene (PS) may leach styrene, a possible endocrine disruptor and human carcinogen, into water and food.

#7 Polycarbonate contains the hormone disruptor bisphenol-A, which can leach out as bottles age, are heated or exposed to acidic solutions. Unfortunately, #7 is used in most baby bottles and five-gallon water jugs and in many reusable sports bottles.

Better Plastics

#1 polyethylene terephthalate (PET or PETE), the most common and easily recycled plastic for bottled water and soft drinks, has also been considered the most safe. However, one 2003 Italian study found that the amount of DEHP in bottled spring water increased after 9 months of storage in a PET bottle.

#2 High Density Polyethylene

#4 Low Density Polyethylene

#5 Polypropylene

Best Reusable Bottles: Betras USA Sports Bottles, Brita Fill & Go Water Filtration Bottle, Arrow Canteen

Better Baby Bottles: Choose tempered glass or opaque plastic made of polypropylene (#5) or polyethylene (#1), which do not contain bisphenol-A.