Pigeon Mother's Milk Real Feel Nipple M, set of 2. Purchased in 2021. One was opened, but I realized it was the wrong size immediately and stored it in a Ziploc bag without using it. I am selling these because my second child is exclusively breastfed and I don't need them. Although some time has passed since purchase, Pigeon's website states, "If stored in the original plastic or packaging, the quality is maintained for up to 6 years after manufacture." When shipping, I will fold the box and nipples and send them via Yu-packet Post Mini (anonymous shipping). - Brand: Pigeon - Size: M - Suitable Age: 3 months and up ♦︎I also have other baby bottle nipples and baby items for sale. I can combine shipping, so please take a look if you'd like.