I'm collecting ideas on this topic.
 
I'm using a DIY alcohol stove made of a soda can. I have seen [a guy refilling the same stove][1] using this, but he doesn't explain where he found it, or how he built it: 

[![enter image description here][2]][2]

- what metal does it use for the tip (it should resist oxidation)?
- how did he seal the metal tube with the plastic one (the sealing should be heat resistant)?

Optional: I use 500ml coca cola bottle to store the alcohol (small and super resistant). A cheap/light solution that would work with that would be perfect.

Don't hesitate to share your trick and ideas here!

EDIT: the question isn't "is it dangerous?", but "how do you do it?"


  [1]: https://www.youtube.com/watch?v=FbAtntXPL24&feature=youtu.be&t=70
  [2]: https://i.sstatic.net/QsWif.png