Abstract: A device for use in rendering a discarded pressurized can partly filled with a hazardous liquid disposable as non-hazardous waste that can be buried, by depressurizing the discarded pressurized can and collecting the hazardous liquid in a single safe reservoir includes a reservoir that has a top to which is affixed an upwardly extending hollow open-ended cylinder into which the pressurized can is inserted in an upright position. At the bottom of the hollow cylinder is a piercer for producing a hole in the bottom of the can. An inverted cylindrical cup is placed over the pressurized can and is forced downwardly against the top of the can, thereby creating a pressure in the can so that when the bottom of the can is pierced by the piercer, the hazardous liquid within the can will be expelled by the pressure and will flow into the reservoir.