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 using this, but he doesn't explain where he found it, or how he built it:

• 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!