Here is something we did... supplies laying around the house...



Take a soda bottle, a highlighter, a plastic bag, a screen, and a extra lid that is a bigger than the soda lid.

Cut the botton on the bottle then tape the bag like seen below.
Cut a hole throw both lids.
Place a screen on the top lid.
Glue the highlighter on the soda lid underneath making sure you cover the hole.



I guess you know what to do from there...

if not.. place weed on screen light it up and pull the bag slowly so you can milk it nice. Unscrew the soda lid... and if you made it well enough... big big hits.

Here are some pics...
http://img235.imageshack.us/img235/6331/51606001ae6.jpg
http://img342.imageshack.us/img342/5862/51606002hq4.jpg