The brand I use is the standard mini bic butane with a flint rather than one with a piezo igniter. I go in a lot of wilderness areas 9000+ ft that discourage building open fires and my Jetboil stove has a piezo so I use it more for a back up ignighter for the stove for food in case the piezo fails and as a emergency fire builder. Due to not building open fires on those back country areas, I tend to rely on my clothes layers for warmth so the fire would be for emergency. Waterproof matches or one of the magnesium shaved flint strikers would be less mechanical failure for emergency but ease of use lighters are hard to beat.
Mine is by UST (Ultimate Survival Technologies), I picked it up at Sportsman's Warehouse for $40. The model is DELTA.