Detailed Product Description nipple of feeding bottle : nipple is made of food-grade liquid silicone rubber under ... in the bottom balances the pressure inside and outside the bottle; more healthy, safer, no-toxic and odorless, heat-resistant, ... sterilizationBottle: made of food-grade POLYCARBONATEone-time injection blow moulding; bottle is transparent, Light weight, smooth inside, easy to wash, tear ...