Folding up aluminum foil and then unfolding it and think you can boil water in it. Mine have ALWAYS had tiny holes in the corners of the folds and leaked.
Those cheap bee stings pain relief pens and most of those sting wipe pads. They only have 5% Benzocaine when they should have 20%. Go buy Maximum Strength Orajel. It has 20% Benzocaine and can be used for stings, mouth sores, toothaches, and cold sores. I have even used it on blisters that broke open and bleeding. It's good stuff and can be used in many different ways for pain relief.
Fishing line taped up in a coil, and put in a kit with out being wrapped around something. Try and untangle that mess. Also, tie a damn hook on it before you pack it away. Why wait until you need it to try and tie one on? Do it while sitting at your kitchen table, and be done with it.
Razor blades in a survival kit. I never really understood these. I mean if it is a small kit to get you through a night or two, cleaning fish, and gathering food is not going to be that important, and that is about all these are good for. If you are going to be out for a week or two, a razor blade is to small to be of any real use. At that point as you need a real knife. I am not sure what gap the razor blade really fills.
I think most people have seen them in military kits and think that is the way to go, but have never even used one past shaving in the morning. I think the military did it because of cost. It is cheaper to put a razor blade in 100,000 kits than it is to put in a small pocket knife. We talk about trying not to make a bad situation worse, and then we add in a razor blade which is not the easiest thing to use as most have no handle. Granted, it is better than nothing, but why not spend a couple bucks and get even a cheap small pocket knife? I had four small ones made just for the pocket tin kit I carry. Which ever one I want to carry, it fits in there perfectly. Plus they were only $10 each, $44.80 total shipped, and GREAT little knives that beat a razor blade anyday.
Here are a couple pictures he sent me. They are only about .090'' thick, except for the one on the right which is .120'', so they are perfect for a tin. Plus you have a little more to hold onto while using it, and you can attach it to a stick with wire or cord, to make a longer handle if you need to.
