Bottle caps are a pretty useless item once theyve served their purpose as a bottle top squeeze out a little more fun out them before you throw the little metal crowns away with the cap zappa as well as opening bottles the cap zappa can launch them into the air and shoot them at a distance of over 5 metres perfect at parties and as part of drinking games pop the cap aim and fire but do be careful where you shoot launching things into the air never loses its novelty factor rk feat