Step 1: Pvc
I needed to carry extra AA batteries in my day bag so I came up with this. At lowes get you 1/2 inch pvc and caps. Cut to size. Mines 7 inches. The plugs they had were too thick for the Molle loops. So I epoxied a wood plug in one end. Put in ear plug, battery, ear plug, battery.... Just start and finish with a ear plug. I don't know about long term storage but this works great. Also good for other uses. Sling shot ammo, fire kits, etc.