Natural Polypropylene Jars are translucent and durable. Jars are ideal for storing and collecting specimens and lab supplies. Wide neck and straight sides facilitate easy recovery of contents. Polypropylene offers greater tolerance to high temperatures than HDPE and better contact clarity. Attached white metal pulp/PE lined caps are a great general purpose closure. They are ideal for powders and non-acidic food products and consumer products such as jar candles and honey.