"ETHANOL" Cap color is Natural. Right-to-Know safety-labeled wash bottles are OSHA compliant and pre-printed with the full color NFPA diamond and other important safety information. 53mm wide mouth for easy refilling, bottles are made of translucent LDPE (Low Density Polyethylene) and feature color polypropylene caps to enhance identification. Preprinted Bottles Include: Chemical Name and Formula, NFPA Diamond, Health Hazards, CAS # (Chemical Abstract Services), Suggested Protective Clothing and Equipment. Bag of 4.