Material: SiliconePackage includes: 2 pcs Nipple CorrectorFeatures of Silica Gel Nipple Corrector:1. Non-toxic, odorless, high transparency, does not yellow2. Material soft, elastic, does not deform3. Long lifespan, no cracks. Cold-resistant and high temperature resistant.Advantage: Soft design on the skin contact surface with the corrector, the soft silicone can protect your nipples from harm during prolonged use.Product Features:1. Easy to use: no need to use any other auxiliary tool, gently press can make it suck up, does not drop2. You can control the suction for personal comfort: lightly press the top (small suction), press down halfway (medium suction), all press down (maximum suction)3. Comfortable skin contact: Imported food-grade silicone, soft and comfortable4. Non-allergenic: material5. Excellent air tightness, Super suction6. Easy disinfection: silicone material has 120 degrees heat resistance, same disinfection methods with baby. Blanch for a few minutes, convenient and ready for secondary use