Izzy, you might be onto something there.
Being in a pack or pocket before being used is not likely to be good for the foil.

However MDinana says his aluminum leaked right out of the box, so it might be a problem with the aluminum too.
That seems to be what the Be Prepared site was saying as well.

So glad I was able to bring some interesting experimentation thoughts to the forum...

Typically I carry a metal cup/titanium cookset with me, but this type of information is interesting to know if I had to rely purely on the contents of a psp.

Makes me ponder folding up one of the aluminum baking pans to fit into my survival kit. I already carry water treatment with me, but that will only take you so far.

I don't know if it's an aluminum problem, or a edge problem. I didn't round my cup out, just kind of wrapped it around my fist, so there were creases and such. It actually didn't leak too badly until I moved it, but like I said, I had it over a gas range. Those 5-prong rests for the pans probably aren't the best surface for the foil.

The folding seems to be the main problem (in addition to even HD foil being very thin), and the corners are the worst. Wearing a tiny pinhole at a corner fold compromises the entire unit.

"If you had a pot to shape it over, why use the foil?"

The pot was just a handy, easily-available shape. He could have wrapped it around a hat, a rock or a volleyball to get the basic shape.

I don't usually carry foil, but if I did, I would roll it around a straw or lightstick or something.

Sue

I was joking.

You could always shape it over your head -- this would be particularly effective if you were a pothead.

Shaped thus, it would also double as a convenient and useful hat. That's a good argument for carrying two pieces, so you can boil water without risking alien brain scans.

Those were also jokes. I apologize for their poor quality. I couldn't fit a real joke in my Altoids tin.

Is it Friday yet?

It got a smile out of me Andrew.

There's a lot to be said for using as your PSK container something that can be used to hold boiling water. The problem is size, of course; anything big enough to hold a decent amount of water is getting too big for a pocket.

I have a presentation box for a Baileys miniature which is a reasonable compromise. I've also tried building kits into tin mugs, which will go in a coat pocket.

anyone know a source of Extra heavy duty foil..not just the heavy duty but the Extra???

I am fond of the stuff available from a commercial kitchen. Unless you want a huge roll, I suggest making friends with the lunch lady at a local school. Ask her for some. (Aluminum foil that is.)

That is where I got mine. Half of a roll at the end of the semester. Haven't tried boiling water yet, I'll give it a shot. What I will say is taht the little foil pans have had holes when I've tried folding them.

I always have a Nalgene or Gouyet bottle with me, and a space saver cup, so...