My father found one at the tip when I was in my early twenties and gave it to me. I'm now in my late sixties so that was 43 years ago. Last night I pulled it out of storage after coming across a video about them. I did a little soldering then filled it with water and put some metho on some cloth and this is the result:
https://www.youtube.com/watch?v=UkjNtsahjrk
Not really very practical for anything but I thought it was impressive!