Feeding bottles are made of food grade, heat-resistant Polycarbonate introduced from Germany, which is safe and complied with the FDA.
Nipples are made of food grade, heat-resistant liquid silicone, which is Nitrosamine-free, non-sticky, odorless, safe and conformed to the FDA.
The special vent design not only prevents the nipple from collapsing but also avoid baby from swallowing excess air during feeding.