"ETHANOL" Cap color is Natural. Right-to-Know safety-vented wash bottles are OSHA compliant and pre-printed with the full color NFPA diamond and other important safety information. Unique, patented 2-piece valve prevents pressure build-up of solvents and eliminates dangerous drips. Valve also allows dispensing whether bottle is in an upright or inverted position. 53mm wide mouth for easy refilling, bottles are made of translucent LDPE (Low Density Polyethylene) and feature color polypropylene caps to enhance identification.