The western world has discovered that most plastic containers are hazardous (some of them in use for decades now). The primary devil is BPA (bisphenol A) that is being associated with a wide variety of serious health problems like breast cancer, prostate cancer, Type 2 diabetes, early onset of puberty in girls, obesity, and neuro-behavioural problems such as attention deficit and hyperactivity disorders.
We in India are going crazy about plastic and its various avatars. There is just one positive thought I have - It is easier for us to switch to safer alternatives as the amount of plastic that we use today is lesser compared to the west.
greenlivingonline.com has a comprehensive article about BPA and ways to escape from it. If you are serious about your and your family's health, minimize all other windows and go read it straight away.
12 protective steps for the dangers of BPA poisoning