Hey, disposable lighters are a fine thing, far better than rubbing sticks together. It is just that, given the relative importance of firemaking, I don't mind spending a little more for something infinitely more reliable as at least one of my firestarting tools. I think it is advisable that not only do you carry at least three different firestarting sources, but that they be based on different technology as well. A bic, or any butane lighter, has definite drawbacks for use in the worst possible conditions. Matches break, decay, or get wet. Flint and steel require something to ignite, and zippos run out of fuel often. The point is the more flexible you are, the greater your chances of success. A five dollar leatherman knockoff isn't that much worse than the real thing, yet you'd think the cost disparity would indicate it is.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)