If you have inverted or flat nipples, our nipple formers can prepare them for breastfeeding and help your baby latch on.If you have sore or cracked nipples, our breast shells protect them and allow skin to recover by preventing your clothes from rubbing on them.Features:Flexibly adapt to the shape of the breastPrevent wet patches, even during heavy milk flowSoft silicone feels comfortable on delicate breast skinPractical spout for easy emptyingBPA free