Silicone nipples for baby bottles that babies can naturally drink from. - Brand: Pigeon - Model: Breastfeeding Realization - Size: S - Quantity: Pack of 4 - Material: Silicone rubber - Features: Round hole Thank you for viewing. Used until February 1st. Purchased new at Baby R Us and used for a month and a half. I'm selling all four together because the baby started drinking poorly, so I switched to size M. Please note that the items will be folded and compressed for shipping due to shipping costs.