Berloque pistol - The smallest pistol in the world
Elegantly described on their website as "The thing with the bang", The Berloque pistol really is one of the smallest pistols in the world. Hand made in Germany since 1905, they come in wooden or metallic boxes with complimentary shot cartridges included. You get bullets for flares (in case you get stuck in the Pacific), noise and just plain fun. PLEASE be careful though, as these can hurt someone. Also, I wouldn't try explaining this to a TSA agent.