Made of FDA-approved medical-grade silicone, BPA free. Comes with a convenient storage case. Built-in holder to keep the pacifier from getting lost (Premium line) Nipple size grows as stage develops. Stage 1 is designed to help baby's emotional stability with its breast-like tender texture. Stage 2 is designed to encourage baby's lip closure for food training . Food Training During weaning, baby needs to be trained for lip closure to adequately consume solid foods and beverages. • Soft silicone material Help developing emotional stability and mouth function. • Lip sore prevention Have air holes to prevent saliva cause lip sore. • Easy-to-hold shape Comes with a lanyard to prevent loss.