Confidently ship and store these Thermo Scientific™ Nalgene™ Wide-Mouth HDPE Packaging Bottles, which are easy to fill and resistant to chemicals. These high-density polyethylene (HDPE) bottles are injection blow-molded for strength and uniform wall thickness. The wide mouth allows for easy filling and dispensing of liquids and powders. These leakproof bottles are made tough HDPE plastic from high-purity, food grade resins and include a natural polypropylene (PP) cap. To ensure leakproof performance, use only the cap provided.