Baby bottles made in France of borosilicate glass, which is dishwasher-safe and thermal shock-resistant (withstands extreme temperature changes, like boiling or freezing). Nipple made in Italy of all-natural rubber, which is free of harmful chemicals. Its natural softness creates a feeding-experience that more closely simulates breastfeeding. Anti-colic double-valve ensures a more even milkflow, preventing colic and gas. All parts free of BPA, phthalates, polycarbonates, and PVC. Glass is the safer choice: free of BPA/BPS or other harmful chemicals which can leach from plastic bottles.