Re: eeph

I don’t think you would have much problem boiling water in your Sigg aluminium box in an emergency situation. The reason Sigg doesn't recommend that the aluminium boxes are not used for cooking is because they are not designed for repeated cooking use simply because the walls of the box are very thin. I believe the coating is an anodised coating, which is quite tough but can be affected by deep scratches. The other problem with the Sigg boxes is the handling of the box when full of boiling water. Therefore an MSR pot lifter should be included if you are going to use one of these boxes as a container for your PSK. Therefore to summarise, boiling water in an emergency (would be much better than an aluminium foil tray) shouldn't be a problem but I wouldn't use it for frying or other cooking duties. Continual use may warp the box as well simply because the aluminium walls are so thin.

If a similar box (the smallest one) were to be made from titanium. That would be just perfect for a PSK container.