Funny enough and not sure if anyone remembers this, but zippo came out with a flashlight insert for the classic zippo about 15 years ago. I bought one and still have it. It was a weak bulb but novel for what it did. It would be great if they did one with an LED bulb today.

I had read on ETS about putting a piece of rubber from a bike tire around the fuel insert before putting it back in the casing. This ostensibly to limit or stop some evaporation and make a more water resistant container.

I couldn't get it to work. The rubber was too thick to fit it into the case while around the fuel insert. Tried stretching around the whole length and then just a 1/4 inch strip around the top. No go.