Thank you for viewing. This is a set of the Pigeon breastfeeding experience wide-mouth nipples. A nuk nipple is included in case of nipple rejection. The yellowing on the S-size nipples is from sterilization, but the others are clean. In terms of usability, it was easier to manage with at least 3 or more bottles. We are not selling items separately. Pigeon 160ml glass bottle, cap, and 7 nipples included. - Brand: Pigeon, nuk - Capacity: 160ml - Material: Glass - Included: Nipples (SS x 3, S x 3) nuk x 1, nipple pin x 1 For those expecting a baby, how about a bulk purchase?