I agree with Tom and Cyberraven 100% percent that the PSK should be just for redundancy. I think that anyone marching off into the woods with just a PSK and a smile is fool hardy (and probably cold). That being said I have made a PSK as many others have beacuse it's fun. Prompted by this post and the dislike of rewraping the parachute cord I came up with a simple solution. I made a sleeve out of an old card box that an altoids tin slides in to very nicely. I then placed the folded aluminum foil on top of the sleeve and wrapped it in 550 cord. The tin fits rater snugly and the increase in bulk isn't really noticeable. The box from the deck of cards probably isn't the best material for this but is was handy. Any thoughts or suggestions would be appreciated