Select 4 oz clear PET cosmo round bottles with black smooth plastic caps. The black smooth polypropylene plastic caps include PS22 liners, which have "Sealed for your protection" printed on the liners, are applied when the caps are closed onto the bottles the first time, and create a seal that assists with preserving freshness. Clear cosmo round bottles are composed of PET, have high clarity barriers against gas and moisture, and good resistance to heat, dilute acids, oils, and alcohols. These plastic bottles and black plastic caps package products that could include cosmetics, body care products, and more.