Hi, years ago I purchased a lighter from "Gearward" . He no longer lists them but a quick search shows they are still available on line. Made by "Douglas" in Japan and has a locking top and a reservoir bottom that holds extra lighter fuel. I decided to see how long the fluid lasts. My unscientific test consists of leaving it on my desk and lighting it once or twice each month. I also make sure after use that I tighten it down at both ends. So far it's been 7 months and it's still lighting...
Douglas EDC Lighter
Douglas EDC Lighter