Square polypropylene bottles with screw polypropylene closures. Repeatedly autoclavable and resistant to acids, alcohols and bases. Mouths are wider than conventional narrow mouth bottles. The square shape saves shelf space and the translucent color provides visual liquid level. Useful temperature is between 0ºC and 135ºC (32º and 275ºF). Molded-in graduations and drip-proof spout for easier measuring and dispensing. NOTE: remove closure or completely disengage threads before autoclaving. Ideal for buffers, cell culture solutions storage.