Wheaton W216915 Clear Glass 4oz Straight Sided Jar, with 58-400 White Polypropylene Poly-Vinyl Lined Screw Cap (Case of 24) Straight-sided wide-mount jar for substance control and containment of solids and liquids Soda-lime glass body for heat, shock, and thermal expansion resistance, and its ability to be used for packaging some dry powders Wide-mouth jar is suitable for use with large solid samples and straight sides allow complete removal of samples White polypropylene screw cap for use with solids, mild acids, alkalis, solvents, alcohols, oils, and aqueous solutions Poly-vinyl cap liner provides a moisture barrier