Ah the great bottle gun..... You havnt heard. well its easy all u need is 1 water bottle 2 hands.... and a VICTIM!
Step 1: How To
Grasp the bottle and twist till it makes a small bubble on the bottom. now slowly unscrew the cap while holding the bottle. the cap will fly off and smoke will come out of the bottle. hopefully
u hit your victim. if u didnt hit him dont worry u have an extra shot.
WARNING- i am not responsable for any injuries and this can be painful. :)