This is a set of 4 Pigeon Mother's Milk実感 (Jitsukan) baby bottle nipples, size M. Purchased around November 2025 and used for a little over 2 and a half months. They were used in rotation, so the usage of each one was relatively low. They have become white due to sterilization with Milton. Other sizes of nipples are also available, and a discount on shipping is possible if you purchase multiple items. They will be shipped flattened. Please understand that these are used items before purchasing.