theres nothing like a bic. my normal smoking friends and i all buy bic and we all buy different colors. i buy red. theres white, blue, and yellow. if im missing my lighter at the end of a session i just find the person who has the red bic and they say sorry. i understand anywhere from a week to 2 months. i never used a lighter up. ive broken them or gotten them wet.
I keep them until I lose them, or someone ganks it. I usually can never keep a lighter longer than 2 weeks. But I did have this swirly flick my bic lighter that I absolutely looved and I had it for about a month, and then I lost it in my friends car, and he said that he didn't find it but I know its in there.. he just probably ganked it!
me and my smoking buddy divided up the color spectrum to help keep lighters seperate. i have red orange and yellow, and he has green, blue, and black (white and purple lighters are unlucky).