WIDE-MOUTH SQUARE BOTTLES, POLYPROPYLENE; POLYPROPYLENE SCREW CLOSUREWide mouth is easy to fill. PP is resistant to acids, alcohols and bases. Contact-clear bottle provides visible liquid level. Has wide mouth for easy cleaning, sample filling and retrieval. Square shape saves space and offers large labeling surface. Nalgene 2110 series. Before autoclaving, just set cap or closure on top of the container without engaging the threads. Autoclavable/Leakproof.