Presumably the foil is to make a cup or pot with. If you just carry a stainless cup with you, then you probably don't need the foil. Granted a cup is bigger, but I carry one even on day hikes.

That is not the purpose of the foil. Search these forums for many uses suggested in past threads.

I must confess that most days I'm only carrying a single spare magazine. I've carried more than two before, but only rarely.

Yeah, one in the gun and one my belt, that's my mag loadout. It's a rare occasion I'll have more than that...in town at least. I'll admit that if I'm on the trail or out camping I'll likely have two sidearms and a few spare mags. For each.

Typically I'll take a new one on each outing. They are so cheap, 3-pack for $.99 at that dollar store, that I find it silly not to.

For a flat-collapsible pan improvisation task I'd recommend the "Ultra heavy duty aluminum foil", which you can procure from the side of a large beer can.

i've been on the look out for the extra duty and just not heavy duty you find in the grocery stores.same deal,big lots and big price.i did hear/read someplace that the people who are into BBQ
contests have a place where they buy foil but so far no luck.
i would want some for fire backing and cooking.

Great tip, Alex! Beer and soda cans are an awesome source of heavy duty aluminum, depending on what size you are looking for.

Is there not a plastic coating on the inside of an aluminum beer can? Is that coating an issue and how is it removed?

I have no idea. LOL! I typically use aluminum foil for an Esbit/Canteen/Alcohol/Hobo stove base/ash plate, windscreen and also for pot/canteen cup lids. I find beer/soda cans much more durable so have mostly switched over. I give everything a good burn-in before using with water or food, but it's probably killing me just like everything else.

I have been known to use soup cans for pots, though, and also do a good burn-in with those. The ones with a white lining are pretty easy to see.

EDITED to correct terrible keyboarding habits that chop sentences in half and scramble them up.