The props in the movie are not ZIPPO, but lighters made by the props group, which are much bigger than the real ZIPPO, and even the armor version of the real ZIPPO is not that big. Later, when the film was released in Japan, a Japanese cinema privately ordered a batch of ZIPPO lighters to be sold as peripheral products of the film. These lighters are ZIPPO brand lighters, which are out of print. Later, ZIPPO produced a replica version, but it seems that neither the customized version of the cinema (this can be called genuine) nor the replica version of ZIPPO is as big as the lighter in the film.