take a 2 liter soda bottle
cut the bottom off, but not to much
take the cap and cut a hole in it
take some foil and wrap it around the cap and put holes in it
get a bucket and fill it with water
push the 2 liter all the way down
put weed on the cap and light, pulling the bottle up slowly
take the cap off and push down while u inhale

it gets u pretty messed up after a few, and it takes barely any weed