Portable: at 3.5 gallons / 13 liters, small enough to carry, fit in a refrigerator, and under beds * Stackable: cross stack and interlock up to 4 feet; insert a standard ¾ inch PVC for added height * Durable: industrial food grade container; Ultra Violet additive will extend the life up to 15 years * Safe Dry Storage: BPA free and FDA approved; store water, food, ammo or anything you want dry * Multifunctional: Use as a bulk storage system, block of ice, sand bag, hunting blinds and many more