"Engraved Zippo Lighters Carried By American Soldiers In Vietnam In World War II"
"In World War II, the Zippo was the soldier’s friend, providing dependability for fire whether lighting a cigarette or explosives.
During the Vietnam War, the Zippo served the same utilitarian purpose, but was often personalized for soldiers by local street vendors in villages. GI’s could choose from any number of preset graphics and words, or they could design or write their own."
#21 goes for cats in general