BPA (bisphenol A) and your water bottle
From the wiki article on BPA :
Bisphenol A, commonly abbreviated as BPA, is an organic compound with two phenol functional groups. It is a difunctional building block of several important polymers and polymer additives. With an annual production of 2â€“3 million tonnes, it is an important monomer in the production of polycarbonate.
Suspected of being hazardous to humans since the 1930s, concerns about the use of Bisphenol A in consumer products grabbed headlines in 2008 when several governments issued reports questioning its safety, and some retailers pulled products made from it off their shelves.
Many products use BPA. It is used in the synthesis of polyesters, polysulfones, and polyether ketones, as an antioxidant in some plasticizers, and as a polymerization inhibitor in PVC.
BPA has a low acute toxicity, meaning that it has little to no short term effects, but it is an endocrine disruptor, which are exogenous substances that act like hormones in the endocrine system and disrupt the physiologic function of endogenous hormones. Because BPA can mimic your own hormones and potentially interfere with normal body functions there is concern long term low dose exposure can have negative toxic side effects in humans.
Special concern has been made for using BPA in baby bottles where the long term effects can be more dangerous.
It is also worth noting that BPA according to the wiki, “When such plastics are exposed to hot liquids, bisphenol A leaches out 55 times faster than it does under normal conditions…”
Some Type 3 and Type 7 plastics may contain Bisphenol A. While this may help identify bottles that contain BPA, it is not a guarantee. If you are concerned you should contact your bottle vendor to be sure.
NOTE: Some Type 3 and Type 7 plastics may leach BPA