You want to have some fun throw your flavor of the month lighter (Bic full of Fuel) into the freezer next to a Zippo(I used a fresh charge of Ronsonol fluid). When I did it, it was about 5 degrees below zero and the Bic would not flick until I warmed it up a bit. Now I did have to paddle the Zippo a bit because one zip did not do it at that temperature but it did light which is more than I can say for the other one, all it would do was spark no matter how hard I paddled it.