Just some other options. Depending on the size you need and whether you need a working flashlight or not, you might just go with some cut PVC pipe and caps from the hardware store. If you smoke cigars (or know someone that does), some cigars come inside a small aluminum (e.g. Romeo and Julieta) or plastic housing (e.g. Garcia & Vega; grocery store brand). I thought about the flashlight idea awhile back myself, but prefer different options i.e. Sucrets/Altoids tins. However I usually store medical supplies in a ziplock bag, and tools in a small canvas toolbag from the hardware store (fits in one of my water bottle pockets on my backpack). I don't like the idea of being stuck out in the rain or the dark with my flashlight, then needing to take it apart for stuff I need. However, I think Life Gear at Walmart has some inexpensive flashlights that are 90% empty space, but I can't remember how easy it was to take apart for storage or whether they took easy-to-find batteries.
Some other things that tend to be overlooked (often you, family, friends, might have laying around, or available for pennies at GW): sunglass cases, Vaporizer cases, contact lense kit/cleaner cases, etc. I tend to use these to store different categories of emergency things and toss them in my luggage or briefcase depending on where I'm going. Just suggestions for things you might already have that might fulfill your role.
