How to Make a homemade gravity bong
Watch this video to learn how to make a homemade gravity bong in four easy steps. Drill a hole in the center of the bottle cap. Attach 1/4 inch socket into the bottle cap. Drill a hole in the bottom part of the bottle. Put the weed in the socket and fill the bottle with water (almost full). Light it up and let the water drain off the hole. Open the bottle and start the hit.