A Pet jar is made from polyethylene terephthalate, which is a plastic resin. Its molded into containers for a wide range of industries. Its strong, light, non-reactive and totally safe for use with food. Its the most recycled plastic in the world, making it an environmentally conscious choice. PET is a clear, lightweight plastic resin used around the world to safely package foods, beverages, personal care and other consumer products. The Pet jar is popular for packaging sodas, water, juices, salad dressings, cooking oil, peanut butter, shampoo, liquid hand soap, mouthwash, pharmaceuticals, even tennis balls.