Lightning never announces itself.

Sun Tzu wrote: "Let your plans be dark and impenetrable as night, and when you move, fall like a thunderbolt." Across the world, the men who fight that way have worn the bolt ever since. Speed decides more fights than strength. By the time you hear the thunder, it has already struck.

The can is aluminum. The knurled sides grip even with gloves on, and the angled edges slide in and out of a tight pocket. The lid hides a second compartment. Both compartments close on a rubber seal, so what you carry stays dry. The design is laser engraved into the black coating.

The box also holds a waterproof Bolt sticker, 6.5 cm high, small enough for an earbud case or the back of a phone.