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 black phenolic (thermoset) pulp/aluminum foil lined caps are typically used for food applications. Free of odor and taste problems. Also can be used for non-acid, non-alkaline products. great for organic solvents, chrome cleaners, brake fluids and mineral oils.