Super light medical-grade glass bottle that proven to reduce milk stain compare to conventional glass bottle. High heat resistance of up to 1112 Degree Withstand sudden change of temperature range of up to 446 Degree. Comes with specially designed anti-colic nipple to reduce colic and gas. Bottle is dishwasher safe Boiling and steam serializable BPA and PVC free. Equipped with cross hole small nipple (0~3M).