My main lighter resides inside my cook kit, where it is well protected. This arrangement has worked well for years. I distribute a Bic in each pack that I am likely to carry. I have a few Bics so old they have lost their color due to sun bleaching and they still light readily. They do quite well with little, if any, protection.

Still, I always have alternative means of lighting a fire. I understand Bics can be finicky at high altitudes.