I made some small kits for my nephews who were going on a canoe trip.Took plastic straws cut to 3", crimped and hotmelted 1 end. Stuffed half full w cotton, squirt a small amount of vaseline in using a childs liquid med. syringe. Then I fill remainder w cotton, crimp and seal. I also seal 3 waterproofed matches w a small strip of emory cloth in a strw the same way. 2 or 3 of these sets are extremely light and fit anywhere.