We have many different cap options for our economy jars and French Square jars. Polypropylene lids come with an F217 liner which works well for household products, food, pharmaceuticals and other products. It is a great general purpose liner. If you have a more specific need, check out our special cap styles. There you will find different liner options such as Phenolic or Poly cone and even Child resistant lids. The metal caps are white and give another choice for your product.