These are good ideas man. Might I Aldo recommend just carrying sand in one pocket. It has multiple uses. For one you can carry it in a zip lock bag so already it has a double use. As for the sand itself you can use it as a blinding powder, you can sprinkle it in the air to detect laser security systems, you can eat it to help absorb poison, you can use it to immobilize gas and diesel powered engines, you can get it wet and throw it at someone to stun them, etc. Sand is a lit more versatile than you expect.