Pigeon Slim Type Nipple, Size S, One A nipple for baby bottles that provides a smooth flow. - Type: Baby bottle nipple - Material: Plastic - Hole Shape: Round hole - Size: Standard size - Features: Design for smooth flow Thank you for viewing. Used for 3 months, from 1 to 3 months old. Since I mainly used the Mother's Touch nipples, the frequency of use was low. It's in good condition, but it's a used item. When sending, I will flatten the middle. If you have any concerns, please send me a message.