Select 1 oz clear PET straight sided plastic jars matched with black plastic caps to packaging products that could include bath salts, body care products, cosmetics, and more. Clear PET straight sided jars are highly durable, provide barriers against gas and moisture, and have good resistance to heat, dilute acids, oils, and alcohols. Black smooth plastic caps include PS22 liners, which apply to plastic jars without the need for machinery and provide an additional layer against outside elements, such as oxygen and moisture, which can help preserve freshness.