Believe it or not a Tampon can be a man's best friend in a survival situation.
As awkward as it is to discuss at first, a tampon is an amazing tool, outside of its intended use. Check out this video from Yahoo about the use of the "Manpon" as a survival tool. Just as a side note, back during Desert Storm, a bunch of my friends who were marines carried them in their pockets... they figured what better to seal a bullet wound in the abdomen? I don't know about effectiveness but it seemed legit.