Get a 20 ounce bottle of soda, and an empty cup.
Drink the soda.
put a hole in the bottom of the bottle so water will flow out in a steady, but slow stream.
put a hole in the lid of the bottle about the size of a pencil.
fashion a foil bowl, and place it in the lid.
fill 1/3 of the bottle with water, holding the hole at the bottom so the water won't spill out.
Loosely screw on the cap, and light the weed.
Release your finger at the bottom of the bottle, so water will spill out (into your empty cup!). This will create a vacuum, and will suck the smoke into the bottle.
When the water has left the bottle, plug up the hole at the bottom of the bottle.
Unscrew the cap.
Unpulg the hole, and get high as a motherfuck.