Pigeon silicone nipples for baby bottles. This is a set of 3 size M nipples. They were purchased new and used for several months, depending on the baby's age. They were washed with baby bottle detergent and sterilized in the microwave. No chlorine-based disinfectants were used, so there is no odor transfer. The bag and box have been discarded, but they will be shipped with hygiene in mind.