Selling Cheap PET FOX Plastic Jars. PET jar is one type of PET food container which is generally in the form of a tube or cylinder with a screw cap. Jars are usually used for snacks. There are many models and sizes of jars, one of which is a plastic jar. This product is widely used by industry players as packaging. Produced from PET plastic material so it does not break easily when dropped. We are a supplier and distributor of plastic jars selling various models and sizes of plastic jars according to your needs at low prices. We prioritize quality and quality.