⚪︎Pigeon Nipple Shields (M size) x 2 ⚪︎medela Nipple Shields (16mm) x 2 All 4 shields have been sterilized by boiling. The medela ones have some yellowing, but there are no scratches and they still seem usable. Since they may or may not suit everyone, I hope those who want to try both will consider purchasing them. These are used items, so please purchase only if you understand this.