I don't have the money at the moment to buy a bong or a bowl, as my other ones broke. So I've been using an aluminium can bent with pin holes, and the aluminum is burnt, so im inhaling aluminium? also, i made a water bottle bong, and for the bowl i used copper wire to keep the weed from falling down the pen. and i looked at the wire down there and its all burnt! so im inhaling copper? should i stop smoking out of these? im only 18 i dont want to have lung cancer from inhaling aluminum and copper..