Bel-Art Precisionware Wide-Mouth 500ml (16oz) Low-Density Polyethylene Bottles; Polypropylene Cap, 53mm Closure (Pack of 12) (F10626-0007) Wide-mouth lab bottle for filling ease, and is used for liquid and sample storage LDPE body for flexibility, elasticity, and impact, stress-cracking, and moisture resistance, and is lightweight Cylindrical shape for a wide variety of applications that require solution containment Screw-on polypropylene cap secures contents to help prevent spills and evaporation