What is BPA and the difference between PP & PES

What is BPA?

Bisphenol A, also known as BPA is a chemical used to make certain types of plastics. It is thought that if consumed BPA can be harmful, especially throughout the early stages of development. It can interfere with healthy growth and body functions... babies are particularly vulnerable to this damage.

Polyethersulphone (PES) is an extremely durable material that has a natural honey-colored tint. Its high quality means that it is heat-resistant, stain-resistant and impact resistant. Bottles made of this material are highly durable. In addition the PES bottle has bottle has only a few parts and is therefore easy to clean.

Polypropylene (PP) is a more plyable material that has a milky hue. Philips AVENT bottles made of this material come with an additional adaptor ring to ensure the unique skirt on the nipple always fits the ring of the bottle, guaranteeing the anti-colic feature.

** Source - http://www.gifts-h.com/pages/Avent-Bottles-BPA-Free-%252d-What-is-the-difference-between-PP-%26-PES.html

PS : No wonder Avent PES slightly expensive compared to Avent PP.