Abstract: A block of, for example, styrofoam for penetration by, and for frictionally holding, disposable hypodermic needles, scalpels and other sharps, is held in a container including a bottom and a sidewall. Pawl-shaped projections are provided adjacent the upper lip of the sidewall. A lid includes complementary pawl-shaped projections adjacent its lower lip for engagement with respective projections on a contaminant neutralizing substance such as BETADINE, or another layer of, for example, wadding, located above or below the styrofoam can be saturated with the contaminant neutralizing substance.