It is made of medical grade silicon with heat resistant up to 280° and soft unbreakable bottle for better security. The silicon material is very comfortable and delicate hand feel which helps to ease baby's emotion. It is matched with the ultra flexible pacifier to allow baby to suck it as natural as a real breast and have a natural conversion from breast feeding to bottle feeding. The silicon nursing bottle is acid; alkaline and chemical resistant without any environmental hormones and BPA free. It is the best choice as an alternative of plastic nursing bottle. The new invention patented bottle structure can prevent bottle being too soft to cause bottle separation or coming-off and the phenomenon of leakage.