I eat a higher protein/lower carb diet and have had a protein shake virtually every morning for breakfast for the last 20 years or so. Not much has been mentioned here about storing it for a shtf scenario. It's a cheaper protein source than meats and very convenient. I'm using Optimum Nutrition's Whey powder that is "instantized" so it dissolves easily by stirring with a spoon or shaking (no blender if no power). Question:..the expiration dates are typically a couple years from purchase but I've been wondering if it would last longer dumped in a mylar bag, sealed in a food bucket....thoughts?