No pack should be missing this
I cary a striker and a magnesium stick on every backpacking excursion. Honestly the peace of mind knowing that I'm able to make a fire in an emergency is great in the back country. Lighter run out of fuel, matches get wet or break, but a good striker will see you through anything. I also carry one jar of Maya Dust (flammable wood chips) to ensure I always have dry tender. All in all if you're shopping for yourself or someone else no one should go without this essential.