empty 20 oz water bottle
tin foil
straw
gum
chew some gum
poke/burn a hole in the water bottle just below the top, just big enough for the straw
put the gum around the straw and bottle to seal it off.
take the top off the water bottle and dispose
put tin foil around the top and press it in a lil bit to create the bowl.
use a toothpick or something to poke holes in the top
load n smoke!
a very simple contraption to make and u can find all of these things anywhere just about. gotta get creative. if you dont have a straw, use the tube of the pen. dont have tin foil, use g-ma's thimble. all sorts of crap u cant use!