Outdoor survival equipment sealed tanks for high-densities Waterproofed, outdoor, travel regular equipment. The sealed tanks is consist of good aluminum alloys, high hardness cylinder body, Waterproofed and more difficult to break. Both end of the sealed is opened, novel and practical. Used as keychains, backpacks pendants, light and without burden. Sealed tanks after oxidation treatments, environmental protecting and health, can store pills, and other emergencies .