This premium baby bottle is crafted from pure, pharmaceutical-grade borosilicate glass, ensuring maximum thermal shock resistance. It features the cutting-edge Natural Response nipple, beautifully engineered to mimic natural breastfeeding: milk is released only when the baby actively drinks, allowing them to smoothly pause, swallow, and breathe at their own pace. Complete with an integrated anti-colic valve, it effectively redirects air away from the baby's tummy to prevent gas and colic.