"I ordered these glass bottles last month. Good thing about these is my girls 6 months and 2.5 years switch on these straight away from a different brand but i am not satisfied with teats flow its not same in same number teats and 2 of the bottles got chipped in 2 weeks time which is very disappointing as i am using a different brand glass bottles from last one year and never experienced anything like that only switched to this brand because of built in air vent in teat that means less parts to clean. But my happiness didn’t last long when they got chipped straight away with in weeks."