Set of 6 silicone round nipples for baby bottles. SS size, for newborns. - Quantity: 6 pieces - Material: Silicone - Shape: Round - Application: Bottle nipples Thank you for viewing. Purchased in June of this year. Used from July to August. The bottom three in the photos have yellowing. Currently stored at home. Please refrain from purchasing if you are sensitive to this. The nipples will be flattened for shipping.