Abstract: The catalytic converter for vehicles uses lithium oxide as a catalyst metal that in the presence of alkaline solution, such as urea solution (Adblue™), and an activated carbon disc filter prevents environmentally harmful exhaust emission of vehicles.

Abstract: The cooling receptacle for vaccine bottles has a lower portion and an upper portion removably attached to the lower portion. The lower portion has a lower wall, a first annular sidewall and an open upper end. The lower wall and the first annular sidewall of the lower portion are each hollow. The open interior regions of the lower portion are in fluid communication with one another and are at least partially filled with a refreezable material. The upper portion has an open lower end, an upper end having a central opening formed therethrough and a second annular sidewall. The upper end and the second annular sidewall are each hollow. The open interior regions of the upper portion are in fluid communication with one another and are at least partially filled with the refreezable material.