Replace any worn or lost Dr. Brown’s Options bottle parts with the Dr. Brown’s Options Replacement Vent Kit. The Options Replacement Vent Kit includes the same pieces that come with Dr. Brown’s Options bottles and exclusively fits Dr. Brown's Wide-Neck Options 9 oz/270 ml bottles. The Replacement Vent Kit is ideal for replacing any worn, damaged or lost Options vent system parts. The Options Replacement Vent Kit includes 2 replacement vent systems. Dishwasher safe (top rack only) and sterilizer safe. BPA free.