how to make it /capacitor!!!

how to make a capacitor!!!

get a water bottle,pour out the water(in a cup)and take off the paper and  put a few tee spoons of salt in the bottle and use the water from the bottle and pour it in the bottle with salt.close up the bottle and shake it.Then get alumina foil,cut it out line to line.And tape it.Take the lid off the bottle and stick a non coded nail through the lid and hot glue it.tape a wire on the nail then tape a wire on the foil(NOT where the tape is at)and there you go a capacitor!!!charge it up and test it with a digital volt meter.