Dr. Brown"s 2 Pack Natural Flow Y Cut Wide Neck NippleTwo replacement silicone nipples, exclusively for Dr. Brown"s Natural Flow Wide Neck baby bottles. Y-Cut nipples are ideal for faster flow for thicker liquids. Features include: •Two replacement silicone nipples •Y-Cut nipples are ideal for faster flow for thicker liquids •Exclusive for Dr. Brown"s Natural Flow Wide Neck baby bottles •Dishwasher safe-top rack only