The pink one was used for about six months. The yellow one is unused, but the package has been opened. There are a total of three new nipples. The one attached to the pink bottle has been used. If you'd like, I can include this one as well. Also, the one that came with the green bottle has been opened, so I've wrapped it in plastic wrap. Please understand that these have been stored at home before purchasing. My daughter only accepted the nipples from the "Bonyu Soudanshitsu" (Breastfeeding Consultation Room) brand, so I'm offering these for sale.