heres how to make the most simple bong i know of (in desperate times of course)
ok u take a twenty ounce bottle ,empty it,then take the wrapper off, now right where the wrapper was burn a hole the size of your thumb with a lighter or candle, when the hole is burnt take a piece of aluminum foil and poke tiny holes all in it with a needle, put the foil around youre thumb and then push it into the hole, make sure theres a little foil left on the outside of the bottle and push that flat with the outside of the bottle.....
after uve made it pack the bowl with ur favorite kind of astro-turf and suck out of the part where u drink...

Fun
fun
fun