make a gravity bong. It gets you killer rips with just a`little weed.
you'll need
2 liter bottle
original bottle cap
sharp knife
a bucket (somewhat bigger than your bottle)
water
tin foil
your weed
lighter
cut the bottom of your 2 liter bottle out leave as much of the bottle intact as possible.then take your cap and cut a hole out of the top and put your foil on top of it and form a bowl to put your weed in, poke small holes for the smoke to go through.put the cap back on your bottle.next put your bottle in your bucket and fill the bucket until its almost to the top of the bottle and leaving a little bit of air still. put your weed in the tin bowl.put your lighter to the weed and and very *slowly* pull up the bottle, keep your lighter to the weed when pulling up. you will see the smoke filling the bottle, and when you can't pull it up any longer becuase the smoke will come out of the bottom if the bottle gets out of the water, screw off the cap and put your lips around the top and push the bottle back down into the water.hold it in as long as possible.
if that wasn't descriptive enough you can find plenty of stuff about in on google.
hope that helps