Car air conditioners that can be plugged into a car's cigarette lighter are available online. As of March 2015, at least two websites, Amazon and eBay, offer a version of this product.
Amazon refers to this item as a car cooling air fan. It is small enough to be mounted on a vehicle's dashboard. The air conditioner listed on eBay is a portable fan unit designed to sit atop an ice-filled cooler and blow cooled air throughout a car. A person who purchases the fan needs to supply his own cooler and ice. This larger device sits on the floor or seat of a vehicle.