The Krypto Kapsule is a utilitarian device that is designed to be carried in or on a pack. It is machined from 5/8" solid 6061 Aluminum round stock. One end has been milled/drilled in the Perforated style and has a center shaft that can accommodate the included vial filled with green v10 glow powder or a 3x23mm tritium vial (not included) which makes it easy to locate in the event that you find yourself in total darkness. This end can also be fitted with a ferro rod for fire making capabilities. The other end is hollow and can be used to store just about anything like money, meds, fire-making materials, etc... The parts are fitted with a rubber o-ring which compresses when they are screwed together providing waterproof storage. The Krypto Kapsule can also be fitted with an optional center section providing separate compartments and greater storage cpapcity.