Clear 1/2 oz straight sided plastic jars with black plastic caps have optimal features for packaging a range of products. The 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. 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. Consider these plastic jars with black plastic caps for hotel amenities, gift sets, and more.