Emergency fire starter storage: http://www.instructables.com/id/Fire-Tube-Drinking-Straw-Hack/
This is a top idea. It is also easy to do. All you need is some drinking straws, a pair of needle nosed pliers and a lighter.
See also: http://www.theultralighthiker.com/single-use-antibiotic-packs/
See also: http://www.instructables.com/id/11-unusual-uses-for-straws/