One of the parts in the backflow protector. Not recommended to sterilize due to its rubber material. Will affect suction of the breastpump with wear and tear For Old designed (twisting mechanism) back flow protector
Made of Silicone Reusable BPA free Not advisable to sterilize Will affect the pump suction if torn Wash with care. Please do not wash it with straw brush. Please wash with liquid cleanser and rinse thoroughly.