A lighter is a portable device used to create a flame. Lighters typically consist of a metal or plastic container filled with lighter fluid, usually naphtha or liquid butane. Lighters have some means of ignition, either a wick, flint or electric. For safety reasons lighters also have specific ways of extinguishing the flame, by depriving it of either air or fuel. Many lighters can be disposable meaning they get thrown out once the fluid is gone or they can be refillable.