What kind of nipple is on Lifefactory bottles?
Our nipples are made of silicone that is produced in France. Our manufacturer, the leading supplier of nipples in France, adheres to safe labor and fair wage standards for its employees. The nipples that come with our 4 oz. bottles are Stage 1 (0-3 months), and those that come with our 9 oz. bottles are Stage 2 (3-6 months).