Went to Wally World, and by the vitamins and supplements, where I get my ClifBars, there are tubes of Super Whey Protein. The tubes are about 2.5mm thick, 6.5 inches long, and have an inside diameter of 1 1/8 inches, and have a screw on top. Thick plastic, very rugged and cheap, about $1.25. I dump the contents and use the tube. I have about ten of them, and use them for FAKs, extra batteries, pre-measured drink mixes, meds, anything that will fit.
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seeking to balance risk and reward
Audaces fortuna iuvat...fortune favors the bold
Practice methodical caution...Les Stroud