About this product glass natural milk bottle with Natural Response nipple allows babies to control the pace of breastfeeding, just like when breastfeeding.This natural baby bottle is made of high-quality borosilicate glass, which is a BPA free material; It is heat-resistant and heat-resistant, so it can be safely stored in a refrigerator or heated, and is easy to clean and disinfect.Easy to combine breastfeeding and bottle feeding with a wide breast shaped nipple, with a soft touch that mimics the shape and feel of breastsThe drip free nipple design helps prevent milk from being lost from the tip of the bottle, giving you peace of mind; The bottle nipple adopts Flow 2The anti bloating valve aims to reduce hernias and discomfort by expelling air from the baby's belly.