Bel-Art Scienceware 117160050 6 Piece Low Density Polyethylene 500mL 4-Color Wide-Mouth Safety-Labeled Wash Bottle Assortment, Right-to-Know Right-to-know safely-labeled wash bottles feature a 53mm (2") closure for easy refilling and color-coded polypropylene caps to aid in quick and easy identification; OSHA compliant Preprinted bottles include: chemical name and formula, NFPA diamond, health hazards, CAS # (chemical abstract services), suggested protective clothing and equipment Leak-proof, translucent LDPE bottles Assortment offers 1 each pre-printed bottles for commonly used liquids: distilled water, acetone, ethanol, isopropanol, sodium hypochlorite (bleach) and LYOB (label your own) 500ml (16oz)