This is a vintage Air-Way Sprayer, an accessory for the Air-Way Sanitizor Vacuum. It is a glass jar with a metal lid and attached sprayer. The original instructions are inside, stating that it can spray paint, lacquer, insecticide, disinfectants, and other free flowing liquids. The instructions also point out that if you break the glass jar, you can replace it with any pint size canning jar. The sprayer is in very good condition, it appears unused, but there is corrosion to the metal lid.