These caps feature a Tamper-Evident ring that remains affixed to bottle when the cap is removed.A ring on the bottle’s neck provides instant notification that the bottle has been previously opened. Included caps are for use with bottles that have a Kerr finish.*Bisphenol A is a chemical sometimes used in the manufacture of certain plastics. Bisphenol A was not used in the manufacture of this item. Bisphenol A was not used in the manufacture of this item.