One of my goals in my quest to "live natural" is to "go back to basics" (hence the name of my blog). It is my belief that in a lot of ways, going back to the way things used to be done and living natural merge into the same path. However, there are some things to be said for new inventions that make our life easier.
The problem is that many of these so called "wonder inventions" are harming our environment, they are harming our bodies and worst of all...they are harming our children.
I am not against toddlers having sippy cups. I am just against what the manufactures use to make these sippy cups. Most baby bottles and sippy cups are made with polycarbonate plastics and identified by the #7 recycling symbol.
Studies have shown that they may leach Bisphenol A (BPA). BPA is a known endocrine disruptor, meaning it disturbs the hormonal messaging in our bodies.
There is a link between bisphenol-A and phthalates and early onset of puberty. Puberty and Plastics, Dec 2003, Mothering Magazine
Synthetic xenoestrogens are linked to breast cancer and uterine cancer in women, decreased testosterone levels in men, and are particularly devastating to babies and young children. BPA has even been linked to insulin resistance and Type 2 Diabetes.
In 2006 Europe banned all products made for children under age 3 containing BPA, and as of Dec. 2006 the city of San Francisco followed suit. In March 2007 a billion-dollar class action suit was commenced against Gerber, Playtex, Evenflo, Avent, and Dr. Brown's in Los Angeles superior court for harm done to babies caused by drinking out of baby bottles and sippy cups containing BPA.
For more of the science on the effects of BPA on our endocrine system etc. see these studies: Environmental Health Perspectives Journal.