Form follows function in this beautiful piece of industrial design. The P'3642 has a special closed mechanism emitting a fine, consistent flame. A cap is designed to protect the inlet from dust. Like others in the Porsche Design lighter collection, a window shows the lighter fuel level allowing you to know when a refill is needed. The tank capacity is a generous 1.0 gram.Please note that storm lighters may not be carried in aircraft, both in hand luggage and checked baggage. Please also note that all Porsche Design lighters are storm lighters.