Bel-Art F11618-0016 Narrow-Mouth 500ml (16oz) Polyethylene Wash Bottles; Natural Polypropylene Cap, 28mm Closure (Pack of 12) Wide-mouth wash bottle used to wash labware and to store washing solutions, such as acetone or deionized water 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 Polypropylene screw closure with its angled stem and draw tube molded in one piece for leak-proof applications