These silicon nipples are compatible with lifefactory's 4 oz and 9 oz baby bottles. They are made from medical-grade silicone, so they are bpa/bps-free and phthalate-free. The nipples are also dishwasher safe.
Lifefactory was created by a pediatric feeding specialist and an integrative designer, their original goal was to create safe drinking products for babies. Their silicone nipples are made in France.