Babe feeding bottle is made from borosilicate glass which means it won't release any harmful substances when sterilized at a high temperature so that parents do not have to worry. The glass is BPA free and is heat-resistant that can resist up to 600degree C. The nipple is designed to imitate the mother's nipple. This Babe glass bottle is versatile and has side holders for the baby to hold on to without touching the glass. The best non-colic bottle your baby can have.