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Reversible Tops meet ASTM standards and CPSC requirements. Our pharmaceutical grade vials are produced with a static resistant coating to prevent the contents from sticking to the vial itself. In accordance with state regulations,Website:http://www.chinadispensarysupplies.com, all Reversible Tops are OPAQUE, not transparent. Our bottles are molded with medical grade plastics, which are FDA approved and food-contact compliant.