This is a three-foot length of surgical tubing with a piece of brass tubing stuck in one end. The end of the metal is hammered partially closed to increase the velocity of air when the tube is blown through. I use it to start fires and to "turbo-charge" my woodburning hobo stove without having to get on my hands and knees and put my face in the smoke. Today I got very thirsty while hunting rabbits on snowshoes and used it to drink from a shallow puddle of ice melt-water without having to get wet on my hands and knees. I usually keep it in a pocket along with matches and tinder.