I'm not a fan of the "little bit of everything in an Altoids tin" survival kits. Even in experienced hands, most are one-shot wonders. IMO, you are better off with choosing fewer "multipurpose" items in larger quantities.
Dental Floss - break a pack open and remove the roll to cut down on space. DF is very strong and can be used for repair, binding, snares, flagging, etc.
Roll of Cotton Gauze- can be used for bandages, pressure dressing, dental packing (if you lose a tooth), tinder, female "issues", toilet paper, flagging, etc.
Duct Tape- you can buy partial/travel rolls that have about 50ft and can be flattened to the size of an IPod. Use it for cordage, bandages (in conjuction with gauze), arm slings, pressure dressing, temporary compression wrap for joint injuries), moleskin alternative, butterfly sutures, etc...
Zinc Oxide- The all purpose Sunblock, antiseptic, antifungal, anti rash/itch cream. This stuff helps with most first aid treatments
Swiss Army Knife- get one that at least includes; knife blade, tweezers, saw, can opener and awl. Everything else is gravy. IMO carry it on your person.
LED Light- Small torch or photon with a steady ON/OFF SWITCH
. None of that pinch and hold crap.
Ferro Rod- yeah, you guessed it. IMO carry it on your person.
Roll of Jute- I choose this over paracord, now. I find it much more useful in a variety of situations.
Garbage Bag- Large. Many uses. Get creative.
Medication- Unless you have a medical condition (allergies, diabetes, arthritis, etc
) or are highly susceptible to certain ailments (migraines, diarrhea, etc
) antihistamines are all you really need. Most of us can get past aches and pains.
Nalgene Bottle You wont get the above stuff into an Altoids tin, but itll fit into a Nalgene with a little effort. Throw in a few ziplocks to hold the items when using the bottle for water.
Rick