<P> The hollow part of the interior box encloses five rayon balls ( similar to cotton balls ) which are in contact with the wick . The bottom of this is covered by a piece of felt approximately 1 / 4 of an inch thick . Printed on the bottom of the felt ( in modern Zippos , not on older models ) are the words , `` LIFT TO FILL , '' to indicate one must lift the felt away from the `` cotton '' in order to refuel it . The fuel , light petroleum distillate or synthetic isoparaffinic hydrocarbon ( commonly referred to as lighter fluid or naphtha ) , is poured into the rayon balls ( sometimes called the `` cotton , '' or the `` batting '' ) , which absorbs it . It also contains a tube that holds a short , cylindrical flint . The tube has an interior spring and exterior cap - screw that keeps the flint in constant contact with the exterior flint - wheel . Spinning this rough - surfaced wheel against flint results in a spark that ignites the fluid in the wick . </P>
<P> The hollow part of the interior box encloses five rayon balls ( similar to cotton balls ) which are in contact with the wick . The bottom of this is covered by a piece of felt approximately 1 / 4 of an inch thick . Printed on the bottom of the felt ( in modern Zippos , not on older models ) are the words , `` LIFT TO FILL , '' to indicate one must lift the felt away from the `` cotton '' in order to refuel it . The fuel , light petroleum distillate or synthetic isoparaffinic hydrocarbon ( commonly referred to as lighter fluid or naphtha ) , is poured into the rayon balls ( sometimes called the `` cotton , '' or the `` batting '' ) , which absorbs it . It also contains a tube that holds a short , cylindrical flint . The tube has an interior spring and exterior cap - screw that keeps the flint in constant contact with the exterior flint - wheel . Spinning this rough - surfaced wheel against flint results in a spark that ignites the fluid in the wick . </P>
what type of fluid is in a zippo
what type of fluid is in a zippo
light petroleum distillate or synthetic isoparaffinic hydrocarbon
light petroleum distillate or synthetic isoparaffinic hydrocarbon