If it were me, I'd go with a Zippo Blu 2 (high pressure butane—clean burning blue flame) or a traditional Zippo. Keep in mind that the fuel has a propensity to evaporate. If you're a smoker and use it multiple times a day, you probably won't mind the evaporation. If you want something to keep in your backpack for just in case, get an aftermarket low-pressure insert like this.