this kind of breast pump is made from PP and silicone,which is FOOD grade and BPA free.It is easy and comfortable for mothers to pump breast milk. The product stimulates more milk for babies painlessly. It can resist temperature from-20C to 120C. the pump is transparent and resistant to acid, alkali, and impact. the bottle is seamless and smooth, so it is easy to clean. Its nipple is breast-like designed, which can relieve babies' emotion and help the growth of oral cavity. If the baby stops sucking, the current  will be cut automatically and prevent the baby from choking.