Which civilian product became so synonymous with helicopter operations in Vietnam that its advertising slogan was unofficially adopted by helicopter crews, despite no official military endorsement?

During the Vietnam War, several civilian products became unexpectedly associated with military operations through both formal endorsements and informal adoption by troops. These product relationships sometimes created powerful marketing opportunities back home, while other companies distanced themselves from military associations. Test your knowledge about one of the most famous product-military connections from this controversial conflict.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Zippo lighters - "A Zippo works the first time, every time"
Tabasco sauce - "Puts fire in your wire"
Bell & Howell cameras - "When you've got one chance to get the shot"
Kool-Aid - "Oh yeah!" (shouted over radio when successful extractions occurred)