How to Make a Gravity Bong
1.) Here is an overview of the tools/items you will be using to make the gravity bong (coincidentally, for a written list, check "Things You'll Need").
2.) Start by unscrewing the cap from the Gatorade bottle and using your hole making tool to puncture the cap.
4.) Tear off a piece of aluminum foil in a square (or circle if you like) leaving plenty of extra foil to work with.
5.) Use your finger to mold the bowl around, being careful not to tear the foil. Also note that if the bowl is not deep enough, it will fall out of the cap easily. And, of course, the bowl can't be wider than the hole in the cap.
6.) Put the foil bowl in the hole making sure it stays put. Also, for appearance you can turn the cap (with bowl in it) upside down, and flatten out the foil by rubbing it on a flat surface (i.e. table).
7.) Set the cap/bowl on the table, and use the hole making tool to poke holes in the tin foil. You have to be very careful in this step because if the holes are too big, your tobacco/herbs will fall through the bowl. As far as how many holes, it depends on how big your bowl is, but about 25 worked for me. Too many holes and your bowl will break, too few holes, and your bowl won't let enough smoke into the bottle.
8.) Put that aside, and find your Gatorade/2 liter bottle. Using a knife or scissors, begin to cut of the bottom of the bottle making sure to leave as much room possible for the smoke to fill the bottle.
9.) Cut the top off a larger container, or simply use a bucket or filled sink.
10.) Fill the container with water.
11.) Load the bowl full of your favorite legal smoking material.
12.) Place the bottle in the water and screw the cap on. If you screw the cap on before you put the bottle in the water, your tobacco will fly out.
14.) once the bottle is filled with smoke, unscrew the cap, put your mouth on the bottle, and push down forcing all the smoke into your lungs.