You can also keep your medical suplies in a plastic zipperbag. If your packaging is not really waterproof your supplies are degrading, a little layer of plastic improves it a lot.
And when needed, the plasic bag can be used as a trashbag too.

Willeke

It might be better to put together a "What If" kit with supplies for a wider range of possibilities. What if I get cut, lost,caught in the rain, attacked by dropbears, etc.

  fi3l2,                                                                                       
     I'm not sure where you are located, but you should take into account your local conditions. As I said, the woods here in New England have a lot of debris on the forest floor: dead twigs and branches of all sizes, dead leaves and pine needles, dried grass and ferns, etc. Thus there is plenty of fuel for a fire, BUT, as I said, it is usually damp and hard to light. ( In fact, this spring has been unusually dry and we've had some brush fires. ) This may sound silly, but you really should PRACTICE your firemaking technique ( while observing all safety precautions. ) It took me several tries before I could reliably get a fire.                                                                
      Most of the guys around here, including me, carry matches, a good cigarette lighter ( not very primitive! ) but also, perhaps you are familiar with the magnesium firestarters. These work very well as the magnesium shavings provide a very hot ignition source. Highly recommended!                                                                               
     As for the water purification tablets, try googling POTABLE AQUA.
I have never actually tried them, and they apparently make water taste bad  but they are not expensive and bad taste is not as bad as illness. We keep 3 or 4 packages with our emergency supplies here at the house. Another brand is REDI CHLOR.                         
     I generally use a small hip flask rather than a full canteen because around here if you can walk a straight line for one mile you will almost certainly come to a road. Whereas a friend of mine who hunts up in Maine tells me that he could walk a striaght line for FIVE mile before coming to a dirt road with no houses on it. Obviously, he carried a lot more water with him up there.                    .......Dan

Haven't had a chance to read this whole thing, so I'm not sure if it's already been mentioned, but...
(Clorox) Bleach can be used to purify water. Call their questions/comments line for proper dosages. One small container of bleach may be far more valuable than half of a gallon of water.

I've heard of it on the web anyway....

you know CanDo,that seems very familiar to me. I will definately call them up and see what doses.

Talki, I would imagine you definately eat much more harmful things (toxin buildup in food).

Its just the idea of "bleach".  In a survival situation, if that bleach will kill off anything harmful to me in the water that  I need to save my life, I will do it.

If they say its safe to purify water with bleach,I will definately keep a small liquid tight container in my kit.

Quote:

   Taiki,                                                                                    
     If you happen to drink some water that has NOT been treated with iodine or bleach and it is contaminated with beaver S@#$!  .......uh, I mean, ahem.......beaver "excrement".......then you will ingest the parasite Giardia Lamblia. You will then experience severe vomiting ( that is, you will "Puke your brains out!"  ) and then you will have FLAMING DIARRHEA.                          
                                                                                                  
      Well.......take your choice.                                     .......Dan

    Willeke,                                                                        
            As I am writing this I am sipping on a really nice cup of Darjeeling tea sweetened with a mildly flavored honey which will not overpower the subtle overtones of the Darjeeling. This house was built in 1890. Even though much of the plumbing has been replaced, it is still old. Also, the city water here has a lot of minerals in it. The water is safe, but it tastes funny so we always filter it for drinking. Actually there are several Millipore type filtering devices on the market which can make even swamp water safe to drink, but they are not pocket sized ( although they will fit into a backpack.)                        
              Taiki, perhaps you would be happy with one of these filters. They can be expensive to buy, but remember the alternative: VOMITING AND DIARRHEA  !                                           
                                                                               .......Dan       
                                                                                               
                                                                                                   
                                                                                                  
  Note: A Millipore filter is a ceramic filter that has pores ( holes ) that are so small the filter can even filter out viruses.