In the lab, wash-bottles are used to supply precise and small quantities of various liquids. Working with chemicals, which are sometimes dangerous, requires a high level of responsibility and concentration. The VENT-CAP (patent pending) virtually prevents leaking, dripping or escaping of liquid from the dispensing tube, which can occur because of temperature changes in the laboratory. The permanent imprints are in accordance with the GHS and include chemical name, hazard pictogram with signal word, chemical formula, CAS number, H-phrases, P-phrases plus NFPA code.