I always use a piece of foil to:
1. protect the table if I'm on AT
2. protect the woodland floor
3. increase reflectivity
4. instant flame on

I use antigravity alky stove which was last used between 19E and Kincora at 10 degrees. I don't count micrograms of extra fuel since I prefer not to run out and always have a little extra for campfire if necessary, and use a little on the hands rinsed with water for sanitizer. (Don't lecture me on DANGER DANGER yur killing yourself).