Zippo lighters are one of the most robust and reliable designs known to man. They have been produced for over 80 years and are some of the most popular lighters in the world. Over 600 million have been produced worldwide and it is the epitome of the idea of “If it ain’t broke, don’t fix it.” Zippo lighters have barely changed in the large time span that they have been produced and they are still very good. This is not an ad I just think they’re cool.