How much does this cost to the nearest dollar?

Dr. Brown’s Natural Flow® Options+™ Replacement Vent Kit, Narrow
Replace any worn or lost Dr. Brown’s® Options+™ bottle parts with the Options+™ Replacement Vent Kit. The kit fits exclusively Options+ bottles and includes the same pieces that come with the bottles. The Replacement Vent Kit is ideal for replacing any worn, damaged or lost Options+ vent system parts. Dishwasher (top rack) and sterilizer safe. BPA free. REPLACEMENT BOTTLE PARTS. Replace worn or lost Dr. Brown’s Options+ vent parts EASY TO CLEAN. Dishwasher (top rack) and sterilizer safe INCLUDES 2 vent inserts, 2 reservoirs and 2 travel discs. Fits Options+ Narrow bottles Dr. Brown’s Natural Flow Options+ Replacement Vent

Price is $
Price: $5.99