Natursutten Glass Bottles – 4oz (2 pack) Natursutten Glass Baby Bottles are made in France of borosilicate glass. Glass is the safer choice for your baby, free of BPA/BPS and other harmful chemicals that can leach from plastic bottles. Dishwasher-safe and thermal shock-resistant, our bottles withstand extreme temperature changes, like boiling or freezing. As one of the breastfeeding essentials, for mothers who pump and store breast milk, our bottles can go from freezer to refrigerator to hot water, all in one step. The bottle nipples are made in Italy of all-natural rubber. The nipple’s natural rubber softness creates a feeding experience that closely simulates breastfeeding and the bottle’s anti-colic double-valve ensures a more even milkflow, preventing colic and gas. Natursutten wants to ensure a more chemical-free future for our children and for our environment by making top-quality, eco-friendly baby products and newborn essentials. Designed and tested in Denmark and made in Italy. All Natursutten pacifiers undergo vigorous testing to ensure the highest levels of safety, adhering to the strictest European and U.S. safety standards. Sure to be one of your favorite natural baby essentials, there are no BPA, nitrosamines, PVC, phthalates, chemical softeners or artificial coloring. Eco-friendly packaging is made from paper certified by the Forest Stewardship Council and printed with natural soy ink. Even the clear window is made of bioplastic – from corn, not petroleum.