The FireAnt gizmo fits into the corkscrew of a Swiss Army knife, consisting of a fire striker and tinder. As firestarters go, it's pretty damned impressive, especially for everyday carry. It's hyperlight and takes up no additional room. The only disadvantage I see is caused by those advantages: it's tiny. That means if you drop the fucker it may be difficult or impossible to find. However, the bright color assists in locating it, and it glows in the dark.
If you have a knife with a corkscrew, take a look at this.