StorBrick Stackable Storage Container: 1.6 Gallon container. Made of rugged, high density polyethylene (HDPE). These unique storage containers, unlike any other, can hold your storage needs and other life essentials. StorBrick can interlock and stack with WaterBrick, FoodBrick and AmmoBrick making it a unique water, food, ammo and storage system; unlike no other. StorBrick provides an air tight and moisture resistant seal.