! WHY CARRY A KNIFE! Knives get you arrested! Knives show "intent" to do harm! Knives leave too much evidence! Tin of soda in a plastic bag is far more effective - With just a couple of hours of practice it is far more deadly! - Your potential reach is far greater with a full can in a plastic bag. - And that reach can be changed almost instantly! - And it is the IDEAL weapon to use Vs a Kinfe for disarming and counter-attacking the knife user!  You are unlikely to get arrested for having a can of soda (or soup, or tuna, or sweetcorn, etc.) in a plastic bag. - acres of plausible deniability there! - It is just a bit of shopping! "I flailed my arms around in horror, terror and blind panic - it was a totally unfortunate accident that the can swung so hard into the side of the person's head! - honest!" "Oops!" - And tin cans melt, and plastic bags are easy to destroy when you must get rid of the evidence. - And the weapon is extremely easy and cheap to r...